UNT Theses and Dissertations - 10 Matching Results

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An Application of Ridge Regression to Educational Research

Description: Behavioral data are frequently plagued with highly intercorrelated variables. Collinearity is an indication of insufficient information in the model or in the data. It, therefore, contributes to the unreliability of the estimated coefficients. One result of collinearity is that regression weights derived in one sample may lead to poor prediction in another model. One technique which was developed to deal with highly intercorrelated independent variables is ridge regression. It was first propose… more
Date: December 1980
Creator: Amos, Nancy Notley
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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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 Robustness of O'Brien's r Transformation to Non-Normality

Description: A Monte Carlo simulation technique was employed in this study to determine if the r transformation, a test of homogeneity of variance, affords adequate protection against Type I error over a range of equal sample sizes and number of groups when samples are obtained from normal and non-normal distributions. Additionally, this study sought to determine if the r transformation is more robust than Bartlett's chi-square to deviations from normality. Four populations were generated representing norma… more
Date: August 1985
Creator: Gordon, Carol J. (Carol Jean)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Comparison of Three Methods of Detecting Test Item Bias

Description: This study compared three methods of detecting test item bias, the chi-square approach, the transformed item difficulties approach, and the Linn-Harnish three-parameter item response approach which is the only Item Response Theory (IRT) method that can be utilized with minority samples relatively small in size. The items on two tests which measured writing and reading skills were examined for evidence of sex and ethnic bias. Eight sets of samples, four from each test, were randomly selected fro… more
Date: May 1985
Creator: Monaco, Linda Gokey
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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A Comparison of Some Continuity Corrections for the Chi-Squared Test in 3 x 3, 3 x 4, and 3 x 5 Tables

Description: This study was designed to determine whether chis-quared based tests for independence give reliable estimates (as compared to the exact values provided by Fisher's exact probabilities test) of the probability of a relationship between the variables in 3 X 3, 3 X 4 , and 3 X 5 contingency tables when the sample size is 10, 20, or 30. In addition to the classical (uncorrected) chi-squared test, four methods for continuity correction were compared to Fisher's exact probabilities test. The four met… more
Date: May 1987
Creator: Mullen, Jerry D. (Jerry Davis)
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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A comparison of the Effects of Different Sizes of Ceiling Rules on the Estimates of Reliability of a Mathematics Achievement Test

Description: This study compared the estimates of reliability made using one, two, three, four, five, and unlimited consecutive failures as ceiling rules in scoring a mathematics achievement test which is part of the Iowa Tests of Basic Skill (ITBS), Form 8. There were 700 students randomly selected from a population (N=2640) of students enrolled in the eight grades in a large urban school district in the southwestern United States. These 700 students were randomly divided into seven subgroups so that each … more
Date: May 1987
Creator: Somboon Suriyawongse
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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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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