UNT Theses and Dissertations - Browse

The Effects of Rate of Responding on Retention, Endurance, Stability, and Application of Performance on a Match-to-sample Task.
Fluent performance has been described as the retention, endurance, stability, and application of the material learned. Fluent performers not only respond quickly during training, they also make many correct responses during training. The current study used a within-subject design to analyze the effects of increased response rates on Retention, Endurance, Stability, and Application tests. Number of correct responses and number of unprompted, correct responses in error correction procedures were yoked for individual participants across an Accuracy-plus-Rate training condition and an Accuracy-Only training condition. One participant scored better in tests that followed the Accuracy-Only condition. One participant showed results that slightly favor the Accuracy-plus-Rate training condition. The two participants whose response rates were successfully reduced in the Accuracy-Only condition performed better on all tests that followed the Accuracy-plus-Rate condition.
The Effects of Realistic Job Previews on Turnover in a Financial Services Organization
Realistic Job Previews have been shown to impact newcomers to jobs through ircreased self-selection, reduced turnover, eased adjustment, improved performance and increased job satisfaction. To address a turnover problem, Realistic Job Previews were implemented in hiring for two entry level positions in half of 539 branch offices of a large financial services organization. Subjects consisted of 122 Service Representatives and 98 Financial Representatives. Eight months after implementation, turnover rates were compared for control and experimental groups. There was no significant difference between turnover among Service Representatives. Financial Representatives in the experimental group had lower turnover rates (p < .10), with the difference increasing over time. Comparing the turnover rates between three and six months tenure resulted in a statistically significant difference (p < .05).
Effects of Reality Therapy on Teacher Attitudes, Student Attitudes, Student Achievement, and Student Behavior
No Description Available.
Effects of Rebar Temperature and Water to Cement Ratio on Rebar-Concrete Bond Strength of Concrete Containing Fly Ash
This research presents the results on an experimental investigation to identify the effects of rebar temperature, fly ash and water to cement ratio on concrete porosity in continuously reinforced concrete pavements (CRCP). Samples were cast and analyzed using pullout tests. Water to cement ratio (w/c) and rebar temperature had a significant influence on the rebar-concrete bond strength. The 28-day shear strength measurements showed an increase in rebar-concrete bond strength as the water to cement ratio (w/c) was reduced from 0.50 to 0.40 for both fly ash containing and non fly ash control samples. There was a reduction in the peak pullout load as the rebar surface temperature increased from 77o F to 150o F for the cast samples. A heated rebar experiment was performed simulating a rebar exposed to hot summer days and the rebar cooling curves were plotted for the rebar temperatures of 180o F - 120o F. Fourier transform infrared spectroscopy was performed to show the moisture content of cement samples at the rebar-concrete interface. Mercury intrusion porosimetry test results on one batch of samples were used for pore size distribution analysis. An in-depth analysis of the morphological characteristics of the rebar-concrete interface and the observation of pores using the scanning electron microscope (SEM) was done.
Effects of Receiver Locus of Control and Interaction Involvement on the Interpretation of Service Complaints
This thesis examined how receivers who vary in Interaction Involvement and Locus of Control (LOC) might differ in their interpretations of service complaints. Locus of control was measured using Rotter's (1966) LOC scale, while Interaction Involvement was measured with Cegala's (1984) Interaction Involvement measure, including a separate assessment of the effects for each sub-scale. Individuals were assigned to four groups based on their Interaction Involvement and LOC scores. The groups were compared with one-another for differences in how complaints were interpreted. Four complaint categories and a corresponding scale were developed to measure these differences. The categories were Subject, Goal, Opportunity, and Accountability. Interaction Involvement was expected to affect how receivers interpret the subject and goal of a complaint, while LOC was predicted to affect understanding of the opportunity and accountability aspects. Two research questions explored possible relationships between the complaint categories and the independent variables for individuals within each group. The study's four hypotheses were not supported, although some evidence was found for a significant relationship between receiver Interaction Involvement and perceived complainant Opportunity, for External LOC individuals only.
The Effects of Reciprocal Teaching Comprehension-monitoring Strategy on 3Rd Grade Students' Reading Comprehension.
Reciprocal teaching comprehension-monitoring is a reading comprehension instructional procedure that combines four instructional strategies: predicting, summarizing, questioning, and clarifying to enhance students' comprehension of text. The procedure is a dialogue between the teacher and the students. During reciprocal teaching instruction, the teacher and students take turns leading the dialogue in order to enhance the students' comprehension-monitoring skills. The research on reciprocal teaching has included meta-analyses, group designs, qualitative designs, and single-subject research designs. These studies have identified gaps in the literature to include the measurement of treatment fidelity and treatment acceptability, as well as the psychometric properties of the instruments used to measure daily reading comprehension growth. These gaps were investigated in this study. The purpose of this study was to investigate the effects of reciprocal teaching comprehension-monitoring with a group of fifteen 3rd grade students reading at grade level. Specifically, this study investigated the use of curriculum-based measurement maze probes (CBM-maze probes) to formatively assess the reading comprehension growth of the students. Additionally, this study implemented treatment integrity procedures and investigated the acceptability of reciprocal teaching and the CBM-maze probes through a treatment acceptability rating scale. A multiple baseline across groups with three phases (baseline, intervention, follow-up) was employed. Overall, visual analysis of the data suggested reciprocal teaching was an effective intervention in increasing reading comprehension abilities in students as measured by the CBM-maze probes. All three groups exhibited continual growth on the daily comprehension measures across all three phases. Implications for practice, cautions in interpreting the results, and future directions are discussed.
The Effects of Reduced Challenge at the Conclusion of Cognitive and Exercise Tasks
Research has suggested that memories for difficult or painful experiences seem related to a combination of the worst and most recent moments. This peak-end theory was tested in relation to an exercise task (eccentric quadriceps using a BIODEX machine) as well as a cognitive task (standardized quantitative test questions). For each type of task there were two trials: short and happy endings. The happy endings trial included the same task as the short trial with an additional 25% duration at a lesser intensity (80% of short task intensity). A 2 (task type) by 2 (trial type) repeated measures design was used. Participants made global ratings of difficulty immediately after each component, thus generating four ratings, and later indicated their preferences for hypothetical future trials. Results indicated support for the theory that the shorter trials are evaluated as more difficult, with the cognitive task being evaluated as more difficult overall than the exercise task. Preference scores, however, revealed a preference only for the happy endings cognitive task, with no preference indicated on the exercise task. Results confirm previous research in suggesting differences between judgements of tasks and future choices. However, confounds complicated interpretations, especially for the cognitive task. The most conservative interpretation of data suggests that in circumstances where "more is better," happy endings will result in more work with no higher level of discomfort. Implications for future research and applications of the theory are discussed.
Effects of Reflection, Probing and Paradoxical Therapist Responses on Client Self-Acceptance
No Description Available.
The Effects of Reframing and Self-Control Statements on Loneliness, Depression and Controllability
No Description Available.
Effects of Reinforcement History on Stimulus Control Relations
Ray (1969) conducted an experiment on multiple stimulus-response relations and selective attention. Ray's (1969) results suggested that stimulus-response relations function as behavioral units. McIlvane and Dube (1996) indicated that if stimulus-response relations are behavioral units the effects of environmental variables on stimulus-response relations should be similar to the effects of environmental variables on single response topographies. This experiment analyzed the effects of reinforcement history on the probability of stimulus-response relations with differing reinforcement histories. In separate conditions random-ratio schedules of reinforcement were contingent on each of four discriminated responses. To assess the effects of reinforcement, during test conditions stimuli controlling different topographies were present concurrently in composite form. Results show that reinforcement history affects the probability of each response topography and that the association between response topographies and their controlling stimuli tends to remain constant throughout variations in reinforcement probability.
Effects of Reinforcer Magnitude on a Fixed Time Food Delivery Treatment of Pica
The purpose of the current study was to examine the effects of using fixed time schedules with different magnitudes of stimulus delivery as treatment for pica. A functional assessment was conducted, which indicated that pica occurred across experimental conditions and was most frequent in the absence of social stimulation or contingencies. A competing stimulus assessment was then conducted to identify stimuli that could potentially compete with pica during NCR. Subsequently, an evaluation of the effects of reinforcer magnitude on NCR as a treatment of pica was conducted. Treatment results indicated that quantity of reinforcer increased the effectiveness of leaner schedules of reinforcer delivery; however, it was not possible to fade the temporal schedule to one that would have been useful in practice. In addition, limitations and future research are outlined.
The Effects of Reinforcing Operant Variability on Task Acquisition
Neuringer, Deiss, and Olson (2000) was replicated and extended to determine the effect of variability contingencies on task acquisition for twelve 7-9 year old children. Subjects first learned to press a computer's shift keys with increasing response variation. Each subject was then exposed to one of three experimental conditions during which they received a point for target responses. Variability condition subjects received additional points on a variable interval schedule for nontarget responses occurring less than 3% of the time. The any condition subjects received additional points on a variable interval schedule for any nontarget response. Control subjects received points only for target responses. All variability condition and two control subjects learned the target response. All any condition subjects and two control subjects did not.
The Effects of Relaxation and Imagery on Karate Performance
The present investigation attempted to determine whether imagery combined with relaxation (VMBR) facmlitated karate performance more effectively than either imagery or relaxation alone. Each subject (N=30) was randomly assigned to either a VMBR, relaxation, imagery or placebo control condition. Trait anxiety tests were administered at the beginning and the end of the six week test period. Performance tests were administered at the final class period along with precompetitive state anxiety. Trait anxiety results indicated a reduction in trait anxiety for all groups. State anxiety results indicated that the VIYBR and relaxation groups exhibited less state anxiety than the imagery and control groups. Performance results produced a main effect only for sparring with the VMBR group exhibiting better performance than all other groups.
Effects of Religious Attendance on Suicidal Ideation: Examining Potential Mediators of Social Support, Locus of Control, and Substance Abuse
Religion has a well-documented relationship with mental health benefits and has consistently demonstrated an impact on several specific mental health concerns, including suicide, generally finding various religious facets to be inversely associated with suicidal thoughts and behaviors. More specifically, religion has been found to be associated with suicide in a number of ways, including decreased acceptance of suicide, decreased likelihood of suicidal thoughts, decreased likelihood of suicidal attempts, fewer suicide attempts, lower relative risk of suicide, lower suicide rate, and increased reasons for living. Several studies have proposed potential mediators (e.g., social support, locus of control, and substance abuse) of the relationship between religion and mental health, usually in non-clinical samples. The current study sought to examine the association between religious attendance and suicidal ideation using archival data of a clinical sample collected from the University of North Texas Psychology Clinic. Results from this sample revealed no evidence of mediation, instead suggesting a direct effect of religious attendance on suicidal ideation. Two mediation models demonstrated the effects of external locus of control and social support on suicidal ideation. These models are discussed in terms of their directionality, considering the extant research on these associations. Findings of the current study have implications for welcoming the incorporation of salient religious topics throughout treatment in mental health settings, including discussion of religious attendance among those clients who have identified religion as a personal value.
The Effects of Residual Gases on the Field Emission Properties of ZnO, GaN, ZnS Nanostructures, and the Effects of Light on the Resistivity of Graphene
In this dissertation, I present that at a vacuum of 3×10-7 Torr, residual O2, CO2, H2 and Ar exposure do not significantly degrade the field emission (FE) properties of ZnO nanorods, but N2 exposure significantly does. I propose that this could be due to the dissociation of N2 into atomic nitrogen species and the reaction of such species with ZnO. I also present the effects of O2, CO2, H2O, N2, H2, and Ar residual gas exposure on the FE properties of GaN and ZnS nanostructure. A brief review of growth of ZnO, GaN and ZnS is provided. In addition, Cs deposition on GaN nanostructures at ultra-high vacuum results in 30% decrease in turn-on voltage and 60% in work function. The improvement in FE properties could be due to a Cs-induced space-charge layer at the surface that reduces the barrier for FE and lowers the work function. I describe a new phenomenon, in which the resistivity of CVD-grown graphene increases to a higher saturated value under light exposure, and depends on the wavelength of the light—the shorter the wavelength, the higher the resistivity. First-principle calculations and theoretical analysis based on density functional theory show that (1) a water molecule close to a graphene defect is easier to be split than that of the case of no defect existing and (2) there are a series of meta-stable partially disassociated states for an interfacial water molecule. Calculated disassociation energies are from 2.5 eV to 4.6 eV, that match the experimental observation range of light wavelength from visible to 254 nm UV light under which the resistivity of CVD-grown graphene is increased.
The Effects of Response Restriction on Non-Socially Maintained Self-Injury
This study examined the effects of response restriction (blocking and protective equipment) on subsequent durations of self-injury with two female participants with developmental disabilities. First, a functional analysis was conducted with each participant to identify potential maintaining variables of the self-injury. Second, access to the response was systematically restricted in a multiple schedule restriction paradigm. A baseline extended alone was conducted without the restriction component in place as a control condition. For one participant the results suggested that response restriction may have increased subsequent durations of responding once the restriction element was removed. For a second participant responding did not appear to be affected by the restriction component.
The Effects of Restricting the Response Space and Self-evaluation on Letter Quality in Beginning and Experienced Handwriters.
This study analyzed the effects of restricting the response space and selfevaluation on students' handwriting quality in two beginning handwriters and two experienced handwriters. Students executed letters with and without using a transparent overlay, in a multiple-baseline-across-letters design. The use of the transparent overlay included drawing letters in a space restricted by the transparency; overlaying a model letter on top of the written letter and; evaluating if the two letters matched. Letter quality immediately improved when overlays were used, and handwriting quality maintained when the writing response was not restricted by the overlay transparency. Prompting and feedback were delivered contingent on on-task behavior. Analysis was based on three different measurement systems.
Effects of Ribavirin on Normal Rat Kidney Cells and Chicken Embryo Fibroblasts Infected with Rous Sarcoma Virus
Ribavirin, a synthetic nucleoside, was found to inhibit the replication of Rous sarcoma viruses (RSV) and subsequent cell transformation in chick embryo fibroblasts (CEF). It also blocked the transformation of normal rat kidney (NRK) cells infected with temperature-sensitive mutants of RSV. The action of Ribavirin was found to be reversible as removal of the drug from the NRK cells reversed the effects on cell transformation. Ribavirin appears to have a static effect on cell growth of both NRK and CEF cells. In addition, guanosine, xanthosine and inosine altered the effect of Ribavirin on cell growth.
The Effects of Rotation Around Two Axes of the Body Upon Static Balance
The problem of this study was to investigate the effect of the rotation around two axes of the body upon static balance as measured by the stork stand, the headstand, and the one foot balance.
The Effects of School Performance on the Self-Concept and Locus of Control of Learning Disabled and Emotionally Disturbed Elementary Students
A number of authors have suggested recently that the behavioral characteristics and self-perceptions of learning disabled and emotionally disturbed children are so similar as to negate the fruitfulness of trying to differentiate between these two groups. These characteristics are quite similar for the two special education groups when they have been compared independently of each other to regular education students. In order to provide support for these prior studies, the self-concepts and locus of control of 36 learning disabled, emotionally disturbed, and regular education students were compared. A significant difference was found between the LD and RE students in terms of self-concept only. No significant differences were noted between the ED and RE students. These results are discussed in relation to the somewhat conflicting results of prior studies with implications for future research.
The Effects of Sedative and Tonic Music on Sterotyped Behaviors in Institutionalized Mental Defectives
Stereotyped behavior in profoundly retarded subjects was observed under sedative and tonic music, with time and movement measures of responding.
The Effects of Selected Algicides and Some Coordination Complexes upon the Apparent Photosynthesis of Chlorella Pyrenoidosa
Many experiments have been performed with the Warburg apparatus, or variations of this manometric technique, since Warburg's experiments (52, 53) where the effects of cyanides upon dark reactions and of urethanes upon light reactions of photosynthesis were demonstrated. The same basic techniques were utilized in this research in attempting to determine the effects of some coordination complexes upon the apparent photosynthetic rate of Chlorella pyrenoidosa. A second goal of the present paper was to investigate the potential of the Warburg apparatus as a tool for screening algicidal compounds.
The Effects of Selected Auditory Stimulation upon Learning Typewriting
The problem of this study was to determine the effects of typewriting practice with selected auditory stimulation on student achievement in typewriting. It included the following sub-problems: 1. Determining the extent to which typewriting practice with selected auditory stimulation affected ability to compose at the typewriter. 2. Determining the extent to which typewriting practice with selected auditory stimulation affected ability to typewrite from dictation. 3. Determining the extent to which typewriting practice with selected auditory stimulation affected ability to typewrite from copy.
Effects of Selected Phytohormones on the Growth and Morphology of Escherichia Coli
The present investigation was undertaken as a preliminary study to learn the response of Escherichia coli cells grown under identical experimental conditions to various concentrations of indoleacetic acid, gibberellic acid, and kinetin alone, and in combination with one another.
The Effects of Selection Risk on Sex Discrimination in Employment Decisions
Effects of selection risk on sex discrimination in hiring were investigated. Ninety-six male and female educational administration graduate students rated ficticious resumes on suitability for hiring for the female-oriented position of secondary school teacher. Sex and selection risk level were varied, with sex of rater as an assigned factor. Analysis of variance yielded significant main effects for sex (p < .01) and selection risk level (p < .05). All ratings were lower in high selection-risk situations, with males preferred over females across both levels of risk. Results suggested that ratings were based on a stereotype of female inferiority in work efficiency, overriding job sex-orientation as a decision factor.
The Effects of Selective Serotonin Reuptake Inhibitors (Ssri) on Auditory Measures in Clinically Depressed Subjects.
The purpose of this study was to investigate the relationship between selective serotonin reuptake inhibitor (SSRI) medication on auditory skills in clinically depressed subjects. Experimental subjects prescribed an SSRI were tested in a medicated and an unmedicated condition, and the test results were compared. Furthermore, the experimental group was compared with a control group consisting of normal subjects. Test measures included pure tone audiometry, tympanometry, acoustic reflex thresholds, and auditory electrophysiologic measures such as auditory brainstem and auditory late responses. An assessment scale for depression (Beck Depression Inventory-II) was also used. Results indicated statistically significant differences for the BDI-II between the control and experimental groups for both conditions. Electrophysiologic measures indicated a significantly shorter latency for auditory late potential P1 at 55 dBnSL, and a significantly larger amplitude at 45 dBnSL for the N1/P2 component for the unmedicated group. Although the other measures showed trends, they did not reach significance.
The Effects of Selective Serotonin Reuptake Inhibitors (SSRI) on Auditory Measures in Women
This study examined the relationship between selective serotonin reuptake inhibitor (SSRI) medication and auditory measures in clinically depressed women. Experimental subjects were tested in both a medicated and unmedicated condition. Experimental subjects were compared to a normal control group; additionally intrasubject comparison was made within the experimental group. Test measures included: audiometry, tympanometry, otoacoustic emissions, uncomfortable loudness level, masking level difference, SCAN-A, Synthetic Sentence Identification (SSI), and the low predictability section of the Revised Speech in noise (RSPIN). The unmedicated group scored significantly less favorably than the control group on the following tests; SCAN-A (composite, filtered words, and auditory figure ground), R-SPIN (0MCR condition in both the right and left ears). Additionally, the unmedicated group scored significantly less favorably than the medicated group on the SSI (-20MCR condition right ear only) and of the R-SPIN (0MCR condition right ear only). Other test measures indicated consistent trends but did reach significance.
The Effects of Self-evaluation and Response Restriction on Letter and Number Reversal in Young Children.
The purpose of this study was to evaluate the effects of a training package consisting of response restriction and the reinforcement of self-evaluation on letter reversal errors. Participants were 3 typically developing boys between the age of 5 and 7. The results indicated that the training package was successful in correcting reversals in the absence of a model during training and on application tests. These improvements maintained during subsequent follow-up sessions and generalized across trainers. Fading was not always necessary in correcting reversals, but was effective in correcting reversals that persisted during the overlay training procedures. The advantages to implementing a systematic intervention for reducing letter reversal errors in the classroom, as well as directions for future research, are discussed.
The Effects of Self-Forgiveness, Self-Acceptance, and Self-Compassion on Subclinical Disordered Eating: The Role of Shame
Disordered eating is a general term that describes a wide range of behaviors from diagnosable eating disorders to subclinical patterns of behavior that do not meet criteria for diagnosis (e.g., problematic weight loss behaviors, excessive dieting, bingeing, purging). Disordered eating is prevalent and has a wide range of physical and psychological consequences. Negative self-conscious emotions such as shame and guilt have been implicated in the development and maintenance of disordered eating. Positive attitudes toward the self (i.e., self-forgiveness, self-compassion, self-acceptance) may be helpful in reducing shame, guilt, and disordered eating symptoms. In this dissertation, I explored the associations between positive attitudes toward the self, negative self-conscious emotions, and disordered eating in a sample of college students and adults (N = 477). Positive attitudes toward the self were associated with lower levels of disordered eating symptoms, and this relationship was partially mediated by lower levels of negative self-conscious emotions. I concluded by discussing areas for future research and implications for clinical practice.
The Effects of Self-Monitoring and Health Locus of Control on Improvement in a Work Hardening Program
This study examined the effects of self-monitoring behavior and health locus of control on improvement in a work hardening program. The subjects included 22 male and 18 female outpatients in a hospital-based rehabilitation program. Subjects were classified as having an internal or external health locus of control, and were randomly assigned to either a self-monitoring or a non-self-monitoring group. Improvement was assessed via objective performance data and self-ratings of perceived improvement. The results indicated that individuals identified as having an internal health locus of control did not show greater gains in physical functioning or perceived improvement relative to externally oriented individuals. Additionally, those subjects participating in self-monitoring activities were no different from non-self-monitoring subjects in terms of improvement in exercise activities or perceived improvement. The results also indicated no interaction between health locus of control and the presence or absence of self-monitoring. It was suggested that other factors such as workman's compensation, pain patient characteristics, low self-concept, and severe stress may have proved more powerful influences on patient improvement than internal health locus of control or self-monitoring. It was also suggested that rehabilitation programs might benefit from creating structured environments in which patients receive frequent staff feedback and reinforcement for improvement. Monitoring small, discrete, easily attainable goals might prove more effective than monitoring mood, pain, etc. In addition, teaching specific internal health locus of control behaviors to patients may help them improve their self-concepts and progress. Further research is needed to explore the roles that pain patient personality characteristics, self-concept, and stress play in the progress of patients in a work hardening program.
Effects of Self-Monitoring and Monetary Reward on Fluid Adherence among Adult Hemodialysis Patients
The effects of a monetary reward and self-monitoring on reducing interdialytic weight gain (IWG) were compared for 6 hemodialysis patients in an outpatient setting. A single-subject experimental design (A-B-BC-B-BC) was used to examine each variable individually and in combination, with alternating phases to control for possible sequencing effects. Monetary reward (50 cents - $3) was administered in a titrated manner according to standardized criteria, ranging from 3 % and 4% of patients' dry weight on weekdays and weekends, respectively, to 3.5% and 4.5% for weekdays and weekends. Self-monitoring involved recording daily fluid and diet intake. Results indicated that by the end of the treatment program, the 6 participants averaged a 14% reduction in weekday IWG and a 15.45% reduction in weekend IWG; however, due to significant variability, it cannot be concluded that the reductions are treatment effects. Four out of 6 participants reduced their average IWG for both weekends and weekdays by .75 kg (1.65 lb.). The average weekend reduction for these 4 participants was .85 kg (1.87 lbs.) while the average weekday reduction was .65 kg (1.43 lb.). All 6 participants showed reductions in weekday IWG that averaged .53 kg (1.17 lb.). However, only 2 participants demonstrated IWG reductions that could be attributable to either of the 2 treatment variables. The standardized dry weight criterion for assessing fluid adherence may have posed excessively stringent demands on participants, as only 1 of the 6 participants actually met the criterion. Future research should address the role of nonspecific treatment factors, as well as patient characteristics and responsivity to particular treatment components in an effort to identify those factors responsible for behavior change in this population.
The Effects of Self-Recording and Projected Levels of Aspiration Upon Competitive Swimming Performance
The purposes of the study were to determine the effects of self-recording techniques upon competitive swimming times, to determine the relationship between stated level of aspiration and subsequent performance, and to determine the influence of success or failure upon stated levels of aspiration. Subjects were fifteen female high-school competitive swimmers. Five subjects utilized self-recording techniques and projected levels of aspiration; ten subjects did not. Data were analyzed by analysis of covariance and by regression analysis. Alpha was .05. Conclusions of this study were that self-recording techniques do not significantly affect competitive swimming times, that a strong relationship exists between stated level of aspiration and subsequent performance, and that successful and unsuccessful performances generate increases in stated levels of aspiration.
The Effects of Sequential Versus Referential Montage Neurofeedback Amplitude Training on Qeeg Measures of Phase and Coherence.
An important clinical research question to be answered in the field of neurofeedback (NF) is whether amplitude training affects connectivity between cortical sites. This study hypothesizes that, following NF amplitude training, there will be a difference in QEEG coherence and phase measures between NF training done using referential montages and using sequential montages. The study examined case files of 16 adult clients from the University of North Texas Neurotherapy Lab who had received NF training that consisted of either referential or sequential placement amplitude training (no coherence training) and who received both pre- and post- treatment QEEGs. Sixty-eight percent of the cases consisted of referential placements, while 34% of the cases consisted of sequential placements. All frontal site phase and coherence abnormal z-scores at pre-treatment were converted to deviation scores and compared by general linear model analysis of variance to post-treatment deviation scores. Effect size r-values and eta square values indicate that differences between referential and sequential electrode placements after NF amplitude training are moderately high. This study shows that referential placements tend to increase phase scores and decrease coherence scores, while sequential placements tend to decrease phase scores and increase coherence scores.
Effects of Sertraline Exposure on Fathead Minnow (Pimephales promelas) Steroidogenesis
Sertraline is a selective serotonin reuptake inhibitor (SSRI) that is widely used for the treatment of depression and anxiety. Due to the abundant therapeutic use of sertraline, low levels have been detected in municipal wastewater effluents suggesting that aquatic organisms may be exposed. The purpose of this study was to evaluate the steroidogenic effects of sertraline on larval (FHM) and adult female fathead minnows (FFHM), Pimephales promelas. Larval FHM were exposed to 0.1, 1, and 10 µg/L sertraline for 28 days and analyzed via RT-qPCR for differential expression of 11β-Hydroxysteroid dehydrogenase (11β-HSD), 20β-Hydroxysteroid dehydrogenase (20β-HSD), aromatase (CYP19), and nuclear thyroid receptor alpha (TRα). FFHM were exposed to 3 or 10 µg/L sertraline for 7 days with the brain and ovary excised at exposure termination. Juvenile FHM exposed to 0.1 μg/L sertraline had a significant upregulation of both 20β-HSD and TRα. FFHM exposed to 10 µg/L sertraline had a significant upregulation of 11β-HSD expression in brain tissue, while no steroidogenic changes were observed in the FFHM ovary. Similarly, in FFHM brain tissue, CYP19 and 20β-HSD expression levels were significantly higher in fish exposed to 10µg/L sertraline compared to control. The significance of these findings with respect to survival, growth and reproduction are currently unknown, but represent future research needs.
The Effects of Shaping and Instruction-based Procedures on Behavioral Variability during Acquisition and Extinction
This study examined effects of two response acquisition procedures on topography of responding using the revealed operant technique and compared results to previous experiments on this topic. Subjects emitted 100 repetitions each of 4 response patterns on a continuous schedule of reinforcement. A 30-min extinction condition followed acquisition. One group of subjects learned the first response through a series of shaping steps designed to reduce acquisition variability. Another group of subjects was instructed in the correct response topography and was told there was no penalty for attempting other sequences. The first group of subjects produced high variability during extinction despite reduced variability in acquisition. The second group of subjects responded with moderate to high variability during extinction and little variability during acquisition. Most extinction responses for the first group were variations of the last pattern reinforced. Most extinction responses for the second group were repetitions of the last pattern reinforced.
The Effects of Shoe Modification on Transverse Tibial Rotation
The purpose of this study was to evaluate the amount of change in transverse tibial rotation at the knee achieved through the use of shoe modification. In addition, an attempt to evaluate the Q-angle dynamically through the stance phase to reflect changes in transverse tibial rotation was made. Ten male subjects were filmed as they ran on a treadmill at a 2.82 m/sec pace and transverse tibial rotation data was collected simultaneously from an affixed electrogoniometer at the knee joint. The subjects were tested under three conditions: 1) barefoot, 2) running shoe, and 3) shoe plus standard orthotic. The results of the study showed that an unprescribed, standard orthotic was ineffective in changing foot pronation and transverse tibial rotation at the knee. It also showed that there was no relationship between leg-heel alignment measurements of pronation and electrogoniometric measurements of transverse tibial rotation. Q-angle measurements could not be obtained from the film date due to difficulty in visualizing body landmarks.
The Effects of Shoe Type on Foot Functioning and Contact Pressures During Walking Performances
The purpose of this study was to evaluate the functional effectiveness of a selection of women's walking shoes with particular attention being directed towards an assessment of specific shoe modifications which were included in a prototype model to theoretically reduce the undesirable characteristics associated with flexible shoes. Nine female subjects performed three trials for each of five shoe conditions. The prototype model decreased the encountered pressures and pressure integrals in the region of the second metatarsal-phalangeal joint. The use of the prototype shoe did not appear to unduly affect the gait of the subject.
The Effects of Short Duration Exercises on the Development of Physical Fitness
The effects of short duration exercise routines on the development of physical fitness.
The Effects of Sign Language on the Vocal Responses of a Child with Autism.
Sign language is an effective form of alternative communication for persons with autism and other developmental disabilities. Only a few studies have systematically measured the effects of sign language on the vocal responses of its users. This study employed a multiple baseline design to evaluate the effects of sign language on the vocal responses of a four-year-old boy with autism. Results indicate that a reinforcement contingency placed only on sign responses is inadequate for maintaining vocal responses. When a reinforcement contingency is placed on sign responses as well as vocal responses that the user is capable of emitting in verbal imitation, both sign and vocal responses are maintained. Results are discussed in terms of the need for a reinforcement contingency placed on vocal and sign responses, the effects of teaching procedures on response variability, and the need for future research to examine procedures utilized to teach sign language to persons within the developmental disabilities population.
The Effects of Simulated Altitude on the Intestinal Flora of Guinea Pigs
The purpose of this paper is to report the results of studies on the aerobic, mesophilic intestinal flora of guinea pigs subjected to conditions similar to those encountered by man in spacecraft.
The Effects of Single and Combined Psyching up Strategies on Basketball Free-Throws and Leg Strength
The present investigation was to determine if combining two mental preparation strategies would be more effective than a single strategy. In Experiment 1, subjects (n=40) performed basketball free-throws (20 shots) using one of these mental strategies: 1) imagery, 2) relaxation, 3)relaxation plus imagery, 4) placebo control. Results indicated a significant main effect with the imagery group performing significantly better than the placebo control group. In Experiment 2, subjects (n=40) performed five trials on an isokinetic leg-strength task using one of the following mental strategies: 1) preparatory arousal, 2) imagery, 3) preparatory arousal plus imagery, 4) placebo control. Results indicated a significant trials main effect with all subjects improving over time. State anxiety results indicated that the combination group exhibited higher levels of anxiety than all other conditions.
Effects of Single VI History on Human Concurrent VI VI Choice
No Description Available.
The Effects of Skill-Builder Controlled Reader Training in Facilitating Skill Development in College Typewriting
The problem of the study was to determine the effects of student use of Skill-Builder Controlled Reader training in facilitating skill development in beginning and intermediate typewriting classes at the college level.
Effects of Social Networks and Media on Pro-Environment Behaviors
In this study, pro-environmental behaviors are investigated by studying if one's primary information sources about environmental issues either from their social network or the media influence this behavior. Data was collected from the 2002 Detroit Area Study with a total of 267 respondents. Three indexes were constructed to separately measure all seven pro-environment behavioral items, five conservation behavioral items, and two consumption behavioral items. A complex sample model was utilized in these analyses. Findings suggest that information sources are correlated to self-reported environmental behavior. As predicted, the people whose primary information source was social network were more likely to obtain higher scores on all three separate indexes than those individuals who primarily received information about environmental issues from the media.
The Effects of Social Structure on Social Movements in Turkey
The main objective of this study is to provide an in-depth analysis the association between a set of social structural factors and the certain types of social movement events in Turkey. The changing nature and significance of social movements over time and space makes this study necessary to understand and explain new trends related to the parameters that constitute a backdrop for social movements. Social movements are a very common mechanism used by groups of people who decide to take action against an unfair socio-political system, usually an authoritarian government or dictatorship. This kind of reactions, seen in history before, gives birth to a more multidimensional understanding of the relationship between society and state policies. Understanding social movements depends on understanding our own societies, and the social environment in which they are developed. An effective way of understanding this type of social movements is to recognize the perceived concerns of discontented groups in relation to cultural, ideological, economic, and political institutions and values. Social movement events included in the study refers to collective activities organized by two or more people with the purpose of protesting public policies or of increasing public awareness about certain social issues related to human rights and freedoms, environment, feminism, etc. All these types of events are chased by police forces, and their concerns, statements, and activities are recorded.
The Effects of Socio-Structural, Economic, and Race Considerations on Rates of Property Crime in the United States, 1958-1993
This study investigates changes in rates of property crime in the United States from 1958 to 1993. Predictor variables include changes in rates of economic factors (inflation, technological/cyclical/frictional unemployment), arrest rates for property crimes disaggregated by race (ARPCDR), interaction of ARPCDR and technological unemployment, alcohol offenses, interaction of alcohol offenses and poverty, drug abuse violations, and interaction of drug abuse violations and poverty. Changes in poverty, population growth, and police presence are employed as control variables. The Beach-McKinnon Full Maximum- Likelihood EGLS AR1 Method (accompanied by residual analysis) is used to test seven hypotheses. Significant positive effects upon changes in aggregate property crime rates are found for five predictors: (a) inflation, (b) cyclical unemployment, (c) frictional unemployment, (d) the interaction of white arrest rates and technological unemployment, and (e) the interaction of rates of alcohol offenses and poverty. To explain changes in property crime rates, further research should decompose aggregate rates particularly those pertaining to the economy. Also, the relationship between the interaction of poverty and drug abuse violations, at the aggregate level, and changes in property crime rates should be clarified. This research has important policy implications related to the impact of social, economic, and educational issues on mainstream society and its criminal elements. Law makers should consider this type of research in all macro and micro-oriented policies.
The Effects of Socioeconomic Status on Growth Rates in Academic Achievement.
The purpose of the study was to examine the differences in academic growth rates as demonstrated on the TAKS test among students based on those who received free lunches, those who received reduced-price lunches, and those not economically disadvantaged. Texas Assessment of Knowledge and Skills (TAKS) for reading and mathematics scale scores were obtained from five Texas public school districts for students who were in 3rd grade in 2003, 4th grade in 2004, 5th grade in 2005, and 6th grade in 2006. The sample included almost 10,000 students. The data were analyzed using SPSS and HLM. SPSS was used to identify descriptive statistics. Due to the nested nature of the data, HLM was used to compare data on three levels- the test level, student level, and district level. Not economically disadvantaged students scored the highest on both TAKS reading and mathematics exams with a mean scale score of 2357 and 2316 respectively in 2003. Compared to the not economically disadvantaged students, students receiving reduce-priced lunches scored approximately 100 points lower, and lowest were the students receiving free lunches, scoring another 50 points below students receiving reduced-price lunches. The results revealed that while gaps in achievement exist between SES levels, little difference exists in the growth rates of the SES subgroups. The results of this study support the need for continued effort to decrease the gap between students who are not economically disadvantaged and those receiving free or reduced-price meals.
The Effects of Specialized Skill Instruction on the Ability of Sixth-Grade Students to Solve Mathematical Word Problems
No Description Available.
The Effects of Specific Health Factors on Interpersonal Relations in a Nursery School Group
The problem in general is to investigate whether or not there is a relationship between certain specific health factors in the individual preschool child and his personal relationships with other children.
The Effects of Specific Interventions with Supervisors on Paraprofessional Turnover in Selected Mental Health and Mental Retardation Facilities
No Description Available.