Ability Estimation Under Different Item Parameterization and Scoring Models

Ability Estimation Under Different Item Parameterization and Scoring Models

Date: May 2002
Creator: Si, Ching-Fung B.
Description: A Monte Carlo simulation study investigated the effect of scoring format, item parameterization, threshold configuration, and prior ability distribution on the accuracy of ability estimation given various IRT models. Item response data on 30 items from 1,000 examinees was simulated using known item parameters and ability estimates. The item response data sets were submitted to seven dichotomous or polytomous IRT models with different item parameterization to estimate examinee ability. The accuracy of the ability estimation for a given IRT model was assessed by the recovery rate and the root mean square errors. The results indicated that polytomous models produced more accurate ability estimates than the dichotomous models, under all combinations of research conditions, as indicated by higher recovery rates and lower root mean square errors. For the item parameterization models, the one-parameter model out-performed the two-parameter and three-parameter models under all research conditions. Among the polytomous models, the partial credit model had more accurate ability estimation than the other three polytomous models. The nominal categories model performed better than the general partial credit model and the multiple-choice model with the multiple-choice model the least accurate. The results further indicated that certain prior ability distributions had an effect on the accuracy ...
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A Study of the Generalization of the Effects of Group Systematic Desensitization of Test Anxiety on Co-Existent Anxiety in College Students

A Study of the Generalization of the Effects of Group Systematic Desensitization of Test Anxiety on Co-Existent Anxiety in College Students

Date: December 1971
Creator: Leffingwell, R. Jon
Description: The problem of this study was to measure the generalization of the effects of group systematic desensitization of test anxiety on certain coexistent anxieties in college students.
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The Relationship between Aptitudes and Success in Vocational and Educational Pursuits

The Relationship between Aptitudes and Success in Vocational and Educational Pursuits

Date: August 1966
Creator: Lewis, Harry Jackson, 1918-
Description: The problem of this study was to determine the relationships between aptitudes and vocational and educational success and between aptitudes and vocational proficiency.
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A Comparison of IRT and Rasch Procedures in a Mixed-Item Format Test

A Comparison of IRT and Rasch Procedures in a Mixed-Item Format Test

Date: August 2003
Creator: Kinsey, Tari L.
Description: This study investigated the effects of test length (10, 20 and 30 items), scoring schema (proportion of dichotomous ad polytomous scoring) and item analysis model (IRT and Rasch) on the ability estimates, test information levels and optimization criteria of mixed item format tests. Polytomous item responses to 30 items for 1000 examinees were simulated using the generalized partial-credit model and SAS software. Portions of the data were re-coded dichotomously over 11 structured proportions to create 33 sets of test responses including mixed item format tests. MULTILOG software was used to calculate the examinee ability estimates, standard errors, item and test information, reliability and fit indices. A comparison of IRT and Rasch item analysis procedures was made using SPSS software across ability estimates and standard errors of ability estimates using a 3 x 11 x 2 fixed factorial ANOVA. Effect sizes and power were reported for each procedure. Scheffe post hoc procedures were conducted on significant factos. Test information was analyzed and compared across the range of ability levels for all 66-design combinations. The results indicated that both test length and the proportion of items scored polytomously had a significant impact on the amount of test information produced by mixed item ...
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An Empirical Investigation of Matrix Sampling Involving Multiple Item Samples in a Two-Factor Analysis of  Variance Design

An Empirical Investigation of Matrix Sampling Involving Multiple Item Samples in a Two-Factor Analysis of Variance Design

Date: December 1971
Creator: Newell, James Archie
Description: The primary purposes of this study were: (1) to study empirically differences that might occur among item-samples and (2) to compare empirically the effect of test item samples on matrix sampling estimates of the mean and variance of a population of test scores, and (3) to study empirically an analysis of variance design through multiple matrix sampling.
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A Study of some Relationships between Level of Self-Concept, Academic Achievement and Classroom Adjustment

A Study of some Relationships between Level of Self-Concept, Academic Achievement and Classroom Adjustment

Date: August 1953
Creator: Reeder, Thelma Adams
Description: The purpose of this study is two-fold: (1) to evaluate an instrument for measuring the self-concept of middle grade children; and (2) to determine the relationship of a middle-grade child's self-concept to his peer status, his classification by the teacher as a problem in behavior or classroom management, and to his academic achievement.
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An Investigation of Factors Affecting Test Equating in Latent Trait Theory

An Investigation of Factors Affecting Test Equating in Latent Trait Theory

Date: August 1998
Creator: Suanthong, Surintorn
Description: The study investigated five factors which can affect the equating of scores from two tests onto a common score scale. The five factors studied were: (a) distribution type (i.e., normal versus uniform); (b) standard deviation of itemdifficulties (i.e., .68, .95, .99); (c) test length or number of test items (i.e., 50,100, 200); (d) number of common items (i.e., 10,20,30); and (e) sample size (i.e., 100, 300, 500). The significant two-way interaction effects were for common item length and test length, standard deviation of item difficulties and distribution type, and standard deviation of item difficulties and sample size.
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The Effects of Computer Performance Assessment on Student Scores in a Computer Applications Course

The Effects of Computer Performance Assessment on Student Scores in a Computer Applications Course

Date: July 1994
Creator: Casey, Sue Hartness
Description: The goal of this study was to determine if performance-based tests should be routinely administered to students in computer application courses. The purpose was to determine the most appropriate mode of testing for individuals taking a computer applications course. The study is divided into areas of assessment, personality traits, and computer attitudes.
Contributing Partner: UNT Libraries
The impact of selected school factors on the test performance of African-American economically disadvantaged elementary students.

The impact of selected school factors on the test performance of African-American economically disadvantaged elementary students.

Date: May 2006
Creator: Griffin, Wynette O.
Description: In order for America to retain its superior position in a global economy it is imperative that all students receive educational opportunities that will prepare them for the future. Currently, African-American economically disadvantaged students in the United States perform lower on standardized tests than their grade and age-level peers. Educators must find ways to improve the performance of students in this group in order to maximize future opportunities. Through a mixed-methodology approach, the current study finds three school factors that may positively impact the performance of African-American economically disadvantaged students: high expectations, student-teacher relationships and teacher effectiveness. Quantitative and qualitative analysis provides perspectives from principals primarily from a large urban school district on the impact of these factors on student performance.
Contributing Partner: UNT Libraries
A Study of the Various Types of Testing Programs Used by Teachers of Mechanical Drawing in the High Schools of Texas

A Study of the Various Types of Testing Programs Used by Teachers of Mechanical Drawing in the High Schools of Texas

Date: 1949
Creator: McIlvain, Tom
Description: The problem of this study is to determine what types of tests are being used in mechanical drawing by the high school teachers of Texas and to suggest ways in which testing in mechanical drawing may be improved.
Contributing Partner: UNT Libraries
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