UNT Theses and Dissertations - 58 Matching Results

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The Effect of Psychometric Parallelism among Predictors on the Efficiency of Equal Weights and Least Squares Weights in Multiple Regression

Description: There are several conditions for applying equal weights as an alternative to least squares weights. Psychometric parallelism, one of the conditions, has been suggested as a necessary and sufficient condition for equal-weights aggregation. The purpose of this study is to investigate the effect of psychometric parallelism among predictors on the efficiency of equal weights and least squares weights. Target correlation matrices with 10,000 cases were simulated so that the matrices had varying degr… more
Date: May 1996
Creator: Zhang, Desheng
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Effect of Rater Training and Scale Type on Leniency and Halo Error in Student Ratings of Faculty

Description: The purpose of this study was to determine if leniency and halo error in student ratings could be reduced by training the student raters and by using a Behaviorally Anchored Rating Scale (BARS) rather than a Likert scale. Two hypotheses were proposed. First, the ratings collected from the trained raters would contain less halo and leniency error than those collected from the untrained raters. Second, within the group of trained raters the BARS would contain less halo and leniency error than the… more
Date: May 1987
Creator: Cook, Stuart S. (Stuart Sheldon)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Effectiveness of a Mediating Structure for Writing Analysis Level Test Items From Text Based Instruction

Description: This study is concerned with the effect of placing text into a mediated structure form upon the generation of test items for analysis level domain referenced test construction. The item writing methodology used is the linguistic (operationally defined) item writing technology developed by Bormuth, Finn, Roid, Haladyna and others. This item writing methodology is compared to 1) the intuitive method based on Bloom's definition of analysis level test questions and 2) the intuitive with keywords id… more
Date: August 1989
Creator: Brasel, Michael D. (Michael David)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Effects of the Ratio of Utilized Predictors to Original Predictors on the Shrinkage of Multiple Correlation Coefficients

Description: This study dealt with shrinkage in multiple correlation coefficients computed for sample data when these coefficients are compared to the multiple correlation coefficients for populations and the effect of the ratio of utilized predictors to original predictors on the shrinkage in R square. The study sought to provide the rationale for selection of the shrinkage formula when the correlations between the predictors and the criterion are known and determine which of the three shrinkage formulas (… more
Date: August 1983
Creator: Petcharat, Prataung Parn
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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An Empirical Comparison of Random Number Generators: Period, Structure, Correlation, Density, and Efficiency

Description: Random number generators (RNGs) are widely used in conducting Monte Carlo simulation studies, which are important in the field of statistics for comparing power, mean differences, or distribution shapes between statistical approaches. Statistical results, however, may differ when different random number generators are used. Often older methods have been blindly used with no understanding of their limitations. Many random functions supplied with computers today have been found to be comparativel… more
Date: August 1995
Creator: Bang, Jung Woong
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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An Empirical Investigation of Marascuilo's Ú₀ Test with Unequal Sample Sizes and Small Samples

Description: The study seeks to determine the effect upon the Marascuilo Ú₀ statistic of violating the small sample assumption. The study employed a Monte Carlo simulation technique to vary the degree of sample size and unequal sample sizes within experiments to determine the effect of such conditions, Twenty-two simulations, with 1200 trials each, were used. The following conclusion appeared to be appropriate: The Marascuilo Ú₀ statistic should not be used with small sample sizes and it is recommended that… more
Date: August 1976
Creator: Milligan, Kenneth W.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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An Empirical Investigation of Tukey's Honestly Significant Difference Test with Variance Heterogeneity and Equal Sample Sizes, Utilizing Box's Coefficient of Variance Variation

Description: This study sought to determine boundary conditions for robustness of the Tukey HSD statistic when the assumptions of homogeneity of variance were violated. Box's coefficient of variance variation, C^2 , was utilized to index the degree of variance heterogeneity. A Monte Carlo computer simulation technique was employed to generate data under controlled violation of the homogeneity of variance assumption. For each sample size and number of treatment groups condition, an analysis of variance F-tes… more
Date: May 1980
Creator: Strozeski, Michael W.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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An Empirical Investigation of Tukey's Honestly Significant Difference Test with Variance Heterogeneity and Unequal Sample Sizes, Utilizing Kramer's Procedure and the Harmonic Mean

Description: This study sought to determine the effect upon Tukey's Honestly Significant Difference (HSD) statistic of concurrently violating the assumptions of homogeneity of variance and equal sample sizes. Two forms for the unequal sample size problem were investigated. Kramer's form and the harmonic mean approach were the two unequal sample size procedures studied. The study employed a Monte Carlo simulation procedure which varied sample sizes with a heterogeneity of variance condition. Four thousand ex… more
Date: May 1976
Creator: McKinney, William Lane
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Establishing the utility of a classroom effectiveness index as a teacher accountability system.

Description: How to identify effective teachers who improve student achievement despite diverse student populations and school contexts is an ongoing discussion in public education. The need to show communities and parents how well teachers and schools improve student learning has led districts and states to seek a fair, equitable and valid measure of student growth using student achievement. This study investigated a two stage hierarchical model for estimating teacher effect on student achievement. This me… more
Date: May 2002
Creator: Bembry, Karen L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Factors Influencing Difficult Special Education Referral Recommendations

Description: The present study is concerned with selected factors that may strongly influence classroom teachers to refer young children for possible placement in special classes when the children are functioning near the borderline for placement on the basis of intelligence test scores. Particular attention was given to the contribution of student attributes (i.e., sex, ethnic background, socioeconomic status, and classroom behavior) and teacher attributes (i.e., age, sex, ethnic background and teaching ex… more
Date: August 1975
Creator: Luckey, Robert E.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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The Generalization of the Logistic Discriminant Function Analysis and Mantel Score Test Procedures to Detection of Differential Testlet Functioning

Description: Two procedures for detection of differential item functioning (DIF) for polytomous items were generalized to detection of differential testlet functioning (DTLF). The methods compared were the logistic discriminant function analysis procedure for uniform and non-uniform DTLF (LDFA-U and LDFA-N), and the Mantel score test procedure. Further analysis included comparison of results of DTLF analysis using the Mantel procedure with DIF analysis of individual testlet items using the Mantel-Haenszel (… more
Date: August 1994
Creator: Kinard, Mary E.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Hierarchical Regression Analysis of the Relationship Between Blog Reading, Online Political Activity, and Voting During the 2008 Presidential Campaign

Description: The advent of the Internet has increased access to information and impacted many aspects of life, including politics. The present study utilized Pew Internet & American Life survey data from the November 2008 presidential election time period to investigate the degree to which political blog reading predicted online political discussion, online political participation, whether or not a person voted, and voting choice, over and above the predication that could be explained by demographic measure… more
Date: December 2010
Creator: Lewis, Mitzi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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How Attitudes towards Statistics Courses and the Field of Statistics Predicts Statistics Anxiety among Undergraduate Social Science Majors: A Validation of the Statistical Anxiety Scale

Description: The aim of this study was to validate an instrument that can be used by instructors or social scientist who are interested in evaluating statistics anxiety. The psychometric properties of the English version of the Statistical Anxiety Scale (SAS) was examined through a confirmatory factor analysis of scores from a sample of 323 undergraduate social science majors enrolled in colleges and universities in the United States. In previous studies, the psychometric properties of the Spanish and Itali… more
Date: August 2017
Creator: Obryant, Monique J
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Influence of Item Response Theory and Type of Judge on a Standard Set Using the Iterative Angoff Standard Setting Method

Description: The purpose of this investigation was to determine the influence of item response theory and different types of judges on a standard. The iterative Angoff standard setting method was employed by all judges to determine a cut-off score for a public school district-wide criterion-reformed test. The analysis of variance of the effect of judge type and standard setting method on the central tendency of the standard revealed the existence of an ordinal interaction between judge type and method. With… more
Date: August 1992
Creator: Hamberlin, Melanie Kidd
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Investigating the hypothesized factor structure of the Noel-Levitz Student Satisfaction Inventory: A study of the student satisfaction construct.

Description: College student satisfaction is a concept that has become more prevalent in higher education research journals. Little attention has been given to the psychometric properties of previous instrumentation, and few studies have investigated the structure of current satisfaction instrumentation. This dissertation: (a) investigated the tenability of the theoretical dimensional structure of the Noel-Levitz Student Satisfaction Inventory™ (SSI), (b) investigated an alternative factor structure using e… more
Date: December 2008
Creator: Odom, Leslie R.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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An Investigation of the Effect of Violating the Assumption of Homogeneity of Regression Slopes in the Analysis of Covariance Model upon the F-Statistic

Description: The study seeks to determine the effect upon the F-statistic of violating the assumption of homogeneity of regression slopes in the one-way, fixed-effects analysis of covariance model. The study employs a Monte Carlo simulation technique to vary the degree of heterogeneity of regression slopes with varied sample sizes within experiments to determine the effect of such conditions. One hundred and eighty-three simulations were used.
Date: August 1972
Creator: McClaran, Virgil Rutledge
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Measurement Disturbance Effects on Rasch Fit Statistics and the Logit Residual Index

Description: The effects of random guessing as a measurement disturbance on Rasch fit statistics (unweighted total, weighted total, and unweighted ability between) and the Logit Residual Index (LRI) were examined through simulated data sets of varying sample sizes, test lengths, and distribution types. Three test lengths (25, 50, and 100), three sample sizes (25, 50, and 100), two item difficulty distributions (normal and uniform), and three levels of guessing (no guessing (0%), 25%, and 50%) were used in t… more
Date: August 1997
Creator: Mount, Robert E. (Robert Earl)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Missing Data Treatments at the Second Level of Hierarchical Linear Models

Description: The current study evaluated the performance of traditional versus modern MDTs in the estimation of fixed-effects and variance components for data missing at the second level of an hierarchical linear model (HLM) model across 24 different study conditions. Variables manipulated in the analysis included, (a) number of Level-2 variables with missing data, (b) percentage of missing data, and (c) Level-2 sample size. Listwise deletion outperformed all other methods across all study conditions in t… more
Date: August 2011
Creator: St. Clair, Suzanne W.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Monte Carlo Analysis of Experimentwise and Comparisonwise Type I Error Rate of Six Specified Multiple Comparison Procedures When Applied to Small k's and Equal and Unequal Sample Sizes

Description: The problem of this study was to determine the differences in experimentwise and comparisonwise Type I error rate among six multiple comparison procedures when applied to twenty-eight combinations of normally distributed data. These were the Least Significant Difference, the Fisher-protected Least Significant Difference, the Student Newman-Keuls Test, the Duncan Multiple Range Test, the Tukey Honestly Significant Difference, and the Scheffe Significant Difference. The Spjøtvoll-Stoline and Tuke… more
Date: December 1985
Creator: Yount, William R.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Monte Carlo Study of the Robustness and Power of Analysis of Covariance Using Rank Transformation to Violation of Normality with Restricted Score Ranges for Selected Group Sizes

Description: The study seeks to determine the robustness and power of parametric analysis of covariance and analysis of covariance using rank transformation to violation of the assumption of normality. The study employs a Monte Carlo simulation procedure with varying conditions of population distribution, group size, equality of group size, scale length, regression slope, and Y-intercept. The procedure was performed on raw data and ranked data with untied ranks and tied ranks.
Date: December 1984
Creator: Wongla, Ruangdet
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Outliers and Regression Models

Description: The mitigation of outliers serves to increase the strength of a relationship between variables. This study defined outliers in three different ways and used five regression procedures to describe the effects of outliers on 50 data sets. This study also examined the relationship among the shape of the distribution, skewness, and outliers.
Date: May 1992
Creator: Mitchell, Napoleon
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Parent Involvement and Science Achievement: A Latent Growth Curve Analysis

Description: This study examined science achievement growth across elementary and middle school and parent school involvement using the Early Childhood Longitudinal Study – Kindergarten Class of 1998 – 1999 (ECLS-K). The ECLS-K is a nationally representative kindergarten cohort of students from public and private schools who attended full-day or half-day kindergarten class in 1998 – 1999. The present study’s sample (N = 8,070) was based on students that had a sampling weight available from the public-use da… more
Date: August 2011
Creator: Johnson, Ursula Yvette
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Principles for Formulating and Evaluating Instructional Claims

Description: The problem with which this investigation is concerned is that of developing (a) the concept of instructional claim, and (b) credible principles for instructional claim formulation and evaluation. The belief that these constructions are capable of contributing to the advancement of curricular and instructional research and practice is grounded in three major features. The first feature is that of increased precision of basic concepts and increased coherence among them. The second feature is the… more
Date: August 1978
Creator: McCray, Emajean
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Quantitative Modeling Approach to Examining High School, Pre-Admission, Program, Certification and Career Choice Variables in Undergraduate Teacher Preparation Programs

Description: The purpose of this study was to examine if there is an association between effective supervision and communication competence in divisions of student affairs at Christian higher education institutions. The investigation examined chief student affairs officers (CSAOs) and their direct reports at 45 institutions across the United States using the Synergistic Supervision Scale and the Communication Competence Questionnaire. A positive significant association was found between the direct report's … more
Date: December 2007
Creator: Williams, Cynthia Savage
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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