UNT Theses and Dissertations - 19,166 Matching Results

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The Effects of District Expenditure Per Pupil and Low Socio-Economic Status on the Grade 10, 2000 and 2002 Disaggregated Student Performance Scores on the TAAS

Description: Educators can no longer simply look at student totals to distribute instructional dollars. Databased decision-making must be instituted to overcome achievement gaps between white and non-white students. In low-socioeconomic (SES) settings, districts must increase expenditure per pupil (EPP) as low-SES rates rise for all students as district administrators must be in a position to show product rather than process. It was attempted to determine if a positive or negative relationship existed between Anglo, Hispanic, and African-American student test scores and wealth factors on the Texas Assessment of Academic Skills tests in 2000 and 2002. Wealth factors studied included EPP and SES. Data analysis was carried out on 974 independent and consolidated school districts in Texas. Low-SES was found to be a negative predictor of higher test performance on standardized reading and mathematics tests. To varied degrees, low-SES affected all students from all ethnicities as well as affluent students. EPP was attributed with a positive effect on student test performance. Increases of $1,000 or more at one time produce performance increases from 0.20 to 0.40 points. In making specific recommendations, the researcher advises increasing expenditures low-SES districts, schools, and classrooms through the creation of specific district linear equations exhibited in this study. Funds must be earmarked for those students that are affected by poverty. It is also recommended to decrease the number of low-SES students by merging high-SES and low-SES students to dilute poverty's effects. Additional correlation studies that address instructional strategies and outside factors are needed. Finally, a replicating study using Texas Assessment of Knowledge and Skills data over a period would be beneficial.
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Date: May 2006
Creator: Iker, Gary A.
Partner: UNT Libraries

The Effects of Diversity Training on Recognizing Gender Differences in a Corporate Environment

Description: The face of the American workforce is changing. As more women and minorities enter the workplace and globalization continues, workers must work with. interact with, and sell to people who are different from themselves. Workers bring their cultures, attitudes, and modes of operation with them. To address the issue of being productive in a diversified environment, corporations have implemented diversity training programs. For the purpose of this study, diversity was defined as gender differences. This research examined the effects of diversity training on increasing the awareness and understanding of gender differences in the workplace. The experimental design of the study was a pretest posttest involving two groups in a large corporation who received different forms of training to address gender differences. One group received its training in the traditional manner currently used in the corporation. The second group participated in enhanced training targeted to include multiple learning styles and focused on why this effort was important to the individuals as well as the corporation. A true-false test based on gender differences was given prior to the training to account for individual differences and to establish the means for the groups. The same test was given following the training to determine the effectiveness of the training. The statistical procedure used in this study was an analysis of covariance (ANCOVA) in order to determine whether there was a significant difference between the mean scores of the two groups. A level of significance of .05 was specified. Calculations were done using the computer program SPSS version 9.0. The data yielded a statistically significant difference between the employees who received the enhanced training and the employees who received the standard training on knowledge of gender differences in the workplace.
Date: May 2001
Creator: Rouh, Peggy A.
Partner: UNT Libraries

The effects of EDTA chelation therapy on plaque calcium and mineral metabolism in atherosclerotic rabbits

Description: New Zealand albino rabbits exhibited calcified aortic plaques and maximum average serum cholesterol levels of 1200 mg percent after twenty-three weeks on an atherogenic diet (250 to 500 mg percent cholesterol in ten percent corn oil; 200,00 I.U. vitamin D3 per month). One month following termination of the atherogenic diet, rabbits were treated with disodium edetate (Na2EDTA, 50 mg/kg body weight) via the marginal ear vein, on alternating days for a total of twenty infusions each. Aortae were examined for tissue calcium both quantitatively (direct microcomplexometric analysis) and histologically six weeks after completion of EDTA chelation therapy.
Date: May 1980
Creator: Walker, Foster M.
Partner: UNT Libraries

The Effects of Educational Level on the Appreciation of Sexist Humor

Description: Superiority, control, and dominance theories of disparaging humor were reviewed, and sexist humor was studied as representative of the field. The effects of educational level and sex of subject on the judgment of humor in sexist material were investigated, utilizing a set of 50 cartoons and jokes devised to approximate overlapping standard curves on the dimensions sexist content and humor. Subjects were 71 males and 73 females, comprising 84 undergraduates and 60 doctoral graduate students. Each subject performed a forced Q sort of the jokes, with 104 rating for humor and 40 rating for sexism to establish content weights. Subjects' rankings, age, sex, and educational level were recorded upon completion of the task. Significant negative correlations were found between educational level and judgment of humor in sexist material, and female subjects judged sexist material to be significantly less funny than males. Some support was indicated for existing theories.
Date: August 1982
Creator: Gravley, Norma J. (Norma Jean)
Partner: UNT Libraries

The Effects of Electrochemical Therapy on Colon-25 Tumors in Balb-C Mice

Description: The purpose of the research was to treat immunodeficient mice, implanted with colon-25 tumors, with continuous and interrupted electrochemical therapy (ECT). ECT involves the placement of two electrodes, an anode near the center of the tumor and a cathode into the tumor periphery. A constant voltage is applied across the electrodes for a given period of time. The data showed that the interrupted and continuous ECT resulted in a decrease in mean tumor growth as compared to that of the sham controls. The histology of both ECT groups showed an increase presence of large vacuoles, randomly distributed tumor cells as well as the presence of "crevicing" in the medullary tissue. The differential leukocyte counts showed a distinct neutrophilia and lymphopenia in all groups at day 20 post tumor implantation. The results from the experimental groups appeared to support the findings of previous investigators.
Date: December 2000
Creator: Gillen, Aric
Partner: UNT Libraries

Effects of Endurance Intensity and Rest Interval on Subsequent Strength Performance

Description: The purpose of this study was to examine the acute effects of cycling exercise at different intensities and rest intervals on strength performance. Ten males, engaged in concurrent training for at least one month prior to testing, comprised the subject group for this study. Results show only leg press torque and leg press work to be decreased after cardiorespiratory exercise of moderate intensity. Leg extension average power, chest press torque, chest press power, and chest press work after cycling were not decreased from pre-exercise values. No significant effects were found for exercise intensity, testing times, or intensity by testing times. These results indicate that lower body strength is decreased by cycling and that one hour is not sufficient to restore leg strength.
Date: May 1996
Creator: Books, Gregory D. (Gregory Douglas)
Partner: UNT Libraries

Effects of English and Bilingual Storybook Reading and Reenactment on the Retelling Abilities of Preschool Children

Description: The purpose of this study was to investigate the story retelling abilities of preschool children who have experienced storybook reading and storybook reenactment bilingually, in English and Spanish, and preschool children who have experienced storybook reading and storybook reenactment in English only. This is a clinical case study employing both quantitative and qualitative measures comparing four treatment groups. Three evaluation instruments were developed by the researcher and used for posttesting; a story comprehension test, a story retelling guidesheet/scoresheet, and a storybook literacy response evaluation. In addition, participant observation and teacher interviews were used to gather qualitative data regarding learning center extensions of the target text and teacher beliefs and practices about the use of storybooks. The findings from this study show that scores for children who experienced storybook reading and storybook reenactment were significantly better on both the story retelling and story comprehension measures. In addition, a larger proportion of children who experienced storybook reading and reenactment were found to perform at the second level of literacy response on the Levels of Literacy evaluation. No differences were found in relationship to the language used on any of the dependent measures. Findings fromqualitative data showed that children were involved in limited extensions of the storybook read to them regardless of whether they experienced storybook reenactment or discussion. Teacher beliefs and practices related to their role during learning center play was believed to have some influence on children's choices regarding story extensions or dramatic play theme content. Recommendations were made to pre-school teachers that story reenactment was an effective technique with both bilingual and monolingual presentation. Additional research questions were posed also.
Date: December 1996
Creator: Gutierrez-Gomez, Catalina
Partner: UNT Libraries

The Effects of English Immersion Mathematics Classes on the Mathematics Achievement and Aspiration of Eighth-Grade Spanish-Speaking LEP Students

Description: This research grew from concerns relative to the mathematical performance of Spanish-speaking limited English proficient (LEP) public school students. This investigation studied the effects of the sheltered mathematics class on eighth-grade Spanish-speaking LEP students with regard to mathematical achievement, attitudes toward mathematics, the dropout rate, and the number of math credits earned in high school. The enrollment of a sheltered mathematics class was limited to LEP students. The purpose was to compare Spanish-speaking LEP students enrolled in sheltered mathematics classes with Spanish-speaking LEP students enrolled in regular mathematics classes. The research hypotheses were that achievement, mathematical attitudes, the dropout rate, and high school math credits earned would favor enrollment in sheltered mathematics classes. The data for achievement, dropout information, and mathematics course work completed were drawn from student records in the school district data bank. A mathematics attitude survey was given to a sample from the 1995-96 eighth-grade advanced level Spanish-speaking LEP students. The research hypotheses were not accepted. All of the populations did show an academic deficit. However, they did have more positive attitudes than negative attitudes toward mathematics. To improve achievement, staying in school, and a higher rate of inclusion in mathematics related careers the following recommendations were made: 1. Research should be done to write standardized mathematics tests that would be accurate and fair for Spanish-speaking LEP students. 2. Further research should be done into teaching strategies and classroom management particularly suited to Spanish-speaking LEP students. 3. Attitude measures should be used as pretest and posttest to study the effect of sheltered mathematics classes on LEP students in relation to attitudes toward mathematics and motivation to continue schooling. 4. Recruit and train qualified mathematics teachers to teach English as a second language (ESL) mathematics.
Date: December 1996
Creator: Hunt, Beverly Thornhill
Partner: UNT Libraries

The Effects of Environmental Consequences and Data Collection in the Behavior-Contracting Treatment of Obesity

Description: This study investigated the effects of environmental consequences and data 'collection in a behavior contracting procedure for obesity. Also, a validity study examined the GSR as a subject-independent-monitoring technique. Sixteen subjects matched on sex and percent overweight were assigned to one of three contract conditions or to a no-treatment condition. The Data Only Contract Group received consequences for data collection. The With Consequences Contract Group received consequences for data collection and behaviors relevant to weight loss. The Without Consequences Contract Group received no consequences for data collection or behaviors relevant to weight loss. The With Consequences Contract Group lost significantly more weight ( p ≤ .05) than the No Treatment Group. Specific effects were not determined. The results of the validity study suggest that the GSR may not be a valid instrument as a subject-independent-monitoring technique. Factors affecting the galvanic skin response's- effectiveness were discussed.
Date: May 1976
Creator: Rumph, Robin R.
Partner: UNT Libraries

The Effects of "Errorless" Training and Testing on the Performances of Typically Developing Children During Acquisition and Retention.

Description: This study examines the effects of two teaching procedures and two testing procedures (“Skip” and “Guess”) on acquisition, retention and generalization of learning. Three typically developing females between the ages of 8 and 11 learned the 24 lower case letters of the Greek alphabet. Half of the letters were taught with the “Skip” procedure and the other half with the “Guess” procedure. The “Skip” procedure produced faster and more efficient learning than the “Guess” procedure. The “Skip” procedure also resulted in better initial retention (4 weeks), but this effect disappeared in subsequent retention tests. The training conditions did not have differential effects on generalization tests across learning channels, except for the Free/Say channel.
Date: December 2003
Creator: Arnadottir, Iris
Partner: UNT Libraries

Effects of Evaluative Modeling on Client Behavior and Self-Evaluation in Behavior Rehearsal for Assertive Training

Description: A technique for altering subjects' self-evaluations and subsequent performance was developed and tested. Two types of therapist evaluative modeling, positive and critical, were compared, for effectiveness in training subjects to be assertive, with a no-modeling control and an insight treatment group. All modeling conditions used a behavior rehearsal paradigm, while the insight treatment employed a Rogerian therapy design. Dependent measures included a paper-and-pencil self-evaluation scale and a behavioral role-playing test of assertiveness. No significant differences were found among the modeling conditions, but the behavior rehearsal strategy brought about significantly greater increases in assertiveness among the severely unassertive subjects than did the insight treatment.
Date: May 1980
Creator: Lloyd, Sidney William
Partner: UNT Libraries

Effects of Exogenous Steroids on the Adrenal Plasma Membrane Alteration of Steroidogenesis and Cell Morphology

Description: Using cultured Y-1 mouse adrenal tumor cells which produce the steroid 20(-hydroxypregn-4-en-3-one (20-DHP), it was found that 10-5 M corticosterone and deoxycorticosterone increased basal and inhibited ACTH-induced 20-DHP production. The steroid effects were concentration-dependent, reversible, and specific since six other steroids did not stimulate steroidogenesis and varied in their ability to inhibit ACTH-induced steroidogenesis. Cytochalasin D inhibited steroid-stimulated 20-DHP production, suggesting a mechanism of steroid stimulation similar to that of ACTH. Steroidogenesis stimulated by cholera toxin, (Bu) 2 cAMP, or pregnenolone was not inhibited by exogenous steroid; corticosterone increased basal and inhibited ACTH-induced intracellular cAMP production. Steroids altered cell surface morphology. These findings suggest that steroids alter adrenal steroidogenesis by acting within the plasma membrane.
Date: August 1982
Creator: Mattson, Mark Paul
Partner: UNT Libraries

Effects of Experiential Focusing-Oriented Dream Interpretation

Description: This study was designed to examine the effects of Experiential Focusing-oriented dream interpretation. The process was twofold. The first part of this study involved a preliminary step of developing an instrument, the Dream Interpretation Effects Questionnaire (DIEQ). The DIEQ assessed specific effects of Experiential Focusing-oriented dream interpretation, e.g., a sense of easing, fresh air, or movement, increased positive energy or self-understanding, development of a new step, enhanced valuation of dreams, or enhanced understanding of the meaning of the dream. Fifty-two adult volunteers participated in the first part of this study. All participants completed Part One of the DIEQ after reporting a dream and freely associating its meaning to another participant. The results were computed to establish the reliability of the DIEQ. The researcher then used the DIEQ along with a structured interview in a pretest-posttest control group design to examine the effects of Experiential Focusing-oriented dream interpretation. Twenty adult volunteers experienced in Experiential Focusing participated in the second part of this study. They were randomly assigned to an experimental group and a waiting-list control group. The experimental participants completed the DIEQ before (pretest) and after (posttest) a 45-minute Experiential Focusing-oriented dream interpretation intervention. By contrast, the control participants completed the DIEQ before (pretest) and after (first posttest) a 45-minute no-intervention waiting period. Then, the control group participants received the same intervention as the experimental group and completed the DIEQ (second posttest). All participants participated in a structured interview to conclude the study.
Date: August 1998
Creator: Kan, Kuei-an
Partner: UNT Libraries

Effects of Experimental Psychological Stress on Human Physiological Functioning: Mediation by Affiliation

Description: This investigation sought to identify differences in the human psychophysiological stress response when mediated by affiliation, by assessing heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), electrodermal activity (EDA), serum Cortisol (SC) concentration, interleukin-2 (IL-2) concentration, and state anxiety among subjects who underwent an anagram solution task. Thirty male subjects from the University of North Texas were randomly assigned to one of two experimental conditions and asked to solve a series of difficult anagrams either alone or with a companion. Subjects assigned to the control condition were asked to copy permutations of the anagrams. Before, and immediately after the anagram/copying tasks HR, SBP, DBP were measured, blood samples drawn, and The State-Trait Anxiety Inventory (STAI) administered to all subjects. EDA was measured throughout all trials. Changes from baseline through the experimental period for all dependent variables were analyzed by employing difference scores derived from contrasting baseline and experimental measures. These scores were subjected to an analysis of variance (ANOVA) resulting in one significant between group effect among all dependent variables examined. Contrary to stated hypotheses, the alone condition significantly differed from the companion and control conditions by demonstrating a significant decrease in systolic blood pressure from baseline through the experimental period. It was concluded that the decrease in systolic blood pressure from baseline through the experimental period for the alone group was a result of chance sampling of individuals possessing unique psychophysiological response patterns. Appraisals of inter-group differences in response patterns across all dependent variables suggest that an insufficient stressor, and limitations in design, statistical analysis, and measurement may have contributed to this investigation's results. Implications of findings were discussed along with suggestions for future research.
Date: August 1995
Creator: Walker, Douglas W. (Douglas Wallace)
Partner: UNT Libraries

The Effects of Extended Loan Period, Released Time, and Incentive Pay on Increasing Shelving and Shelf-Reading Productivity of Student Assistants in Academic Libraries

Description: The purpose of this research was to determine if an extended loan period, released tine, and incentive pay increased the student assistants' shelving and shelf-reading rates. The first quasi-experiment utilized loan, time, and pay given across the board as motivators. Because the population for this study was small, a questionnaire, intended to strenghten the study's results by identifying additional libraries which effectively use similar motivational techniques, was mailed to the forty private university libraries throughout Texas. A second questionnaire polled the student participants about their feelings about shelving and shelf-reading and about the motivators used in the study. The second quasi-experiment motivated the student assistants by pay tied to productivity. Gender, grade point average, and academic classification were control variables for this study.
Date: May 1984
Creator: Banks, Julia Ann
Partner: UNT Libraries

Effects of External Electric Fields on Light Transmittance in Isolated Crayfish Nerves

Description: Acute effects of a pulsed external electric field (PEEF) at 20 V/cm and a d.c. EEF at 90 V/cm on light transmittance in an isolated compound crayfish nerve was measured. In a third series, the nerve was pre-treated with the Na+ channel blocker tetrodotoxin (TTX). A PEEF produced an irreversible increase in the variation of light transmittance in normal nerves but a reversible increase in TTX treated nerves. This data was statistically insignificant. The d.c. EEFs produced a reversible and statistically significant enhancement of variation in light transmittance in both untreated and TTX-treated nerves. The findings may be due to either (1) an alteration in the ion/fluid flux within the nerve or (2) a physical alteration of protein molecules in the membranes.
Date: December 1995
Creator: Northcutt, Brian S. W.
Partner: UNT Libraries

The Effects of Extinction on Human Performance Following Exposure to Fixed Ratio Schedules of Reinforcement

Description: This experiment examined the effects of extinction on rate of responding and several topographical and temporal measures in adult humans. Three college students were trained to type the sequence 1•5•3 on a numeric keypad on a computer. The subjects were exposed to different fixed-ratio schedules of reinforcement (FR1, FR 5, and FR10 respectively) and extinction. Subjects displayed typical schedule performances during the maintenance phase of the experiment. During extinction the performances were disrupted, they showed a "break and run" pattern and a general decrease in responding. Also, new topographical and temporal patterns emerged. These data are consistent with those reported for non-human species and special human populations.
Date: May 2000
Creator: Anderson, Richard L.
Partner: UNT Libraries

The Effects of Family Cultural Capital on Reading Motivation and Reading Behavior in Elementary School Students with New Immigrant Background: A Structural Equation Model

Description: This study was designed to investigate the impact of family cultural capital on reading motivation and reading behavior among new immigrant children and non-immigrant children. This research used Chang and Wang's family cultural capital, reading motivation, and reading behavior questionnaire to conduct the survey. The target population of this study was students enrolled in fifth grade and sixth grade in elementary school in the fall of 2017 in Tainan, Taiwan. The sample include 414 students from new immigrant families and 422 students from non-immigrant families; the total number of individuals was 837. Structural equation modeling (SEM) analytical procedures were performed to test the hypothesized relationships. The results indicate that the seven latent variables were related to each other directly or indirectly. The main findings of this study are as follows: 1) family socioeconomic status significantly affects students' acquisition of family cultural capital; 2) family reading habits significantly affect students' reading motivation; 3) intrinsic reading motivation significantly affects students' reading behavior; and 4) external reading motivation shows no direct significant effect on reading time or the number of items read.
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Date: August 2018
Creator: Tseng, Hui Te Li
Partner: UNT Libraries