A two-stage procedure for estimating item bias was examined with six indices of item bias and the Mantel-Haenszel statistic. Results suggest that the two-stage procedure is not very useful when the number of biased items is small and bias magnitude is weak. (SLD)

Interactive Simulated Patient (ISP) is a computer-based simulation tool designed to provide medical students with the opportunity to practice their clinical problem solving skills. The ISP system allows students to perform most clinical decision-making procedures in a simulated environment, including history taking in natural language, many…

The objective of this research is to investigate the effects of simulations based on conceptual change conditions (CCS) and traditional confirmatory simulations (TCS) on pre-service elementary school teachers' understanding of direct current electric circuits. The data was collected from a sample consisting of 89 students; 48 students in the…

The purpose of this study was to investigate value of combining Real Experimentation (RE) with Virtual Experimentation (VE) with respect to changes in students' conceptual understanding of electric circuits. To achieve this, a pre-post comparison study design was used that involved 88 undergraduate students. The participants were randomly assigned…

This study assessed social skills in 116 children aged 7-12 with ADHD-Combined Type (ADHD-C; n=33), ADHD-Inattentive Type (ADHD-I; n=45), and comparison children (n=38), with consideration of the role sluggish cognitive tempo (SCT) symptoms play in distinguishing profiles. Social skills were assessed using a novel computerized chat room task, in…

The following seven statistical procedures are compared in terms of the ability to recover a unidimensional latent trait from Likert-type data: (1) factor analysis based on Pearson correlations (FA-PR); (2) factor analysis based on polychoric correlations (FA-PL); (3) the graded response model in item response theory (IRT-GRM); (4) internal…

Hierarchical Bayes procedures were compared for estimating item and ability parameters in item response theory. Simulated data sets from the two-parameter logistic model were analyzed using three different hierarchical Bayes procedures: (1) the joint Bayesian with known hyperparameters (JB1); (2) the joint Bayesian with information hyperpriors…

Three methods of estimating test score distributions that may improve on using the observed frequencies (OBFs) as estimates of a population test score distribution are considered: the kernel method (KM); the polynomial method (PM); and the four-parameter beta binomial method (FPBBM). The assumption each method makes about the smoothness of the…

The present study investigated whether infants of mothers who were depressed postpartum would behave like infants of non-depressed mothers who simulated depression. A total of 24 mothers and their 3-month-old infants were videotaped during face-to-face interactions. All mothers were given the Beck Depression Inventory (BDI) and the State-Trait…

A latent trait model is described that is appropriate for use with tests that measure more than one dimension, and its application to both real and simulated test data is demonstrated. Procedures for estimating the parameters of the model are presented. The research objectives are to determine whether the two-parameter logistic model more…

This study investigated place location learning from a simulated environmental exploration experience in terms of two variables: gender (both cognitive and affective effects) and presence and/or type of accompanying map. Subjects were 120 fourth and fifth grade students, who were randomly selected and assigned after stratification on gender. The…

The effectiveness of the inductive instructional method of general case programming was compared to the deductive approach of rule learning, in attempting to facilitate generalized learning and maintenance of a community living skill for adults with mental retardation. The impact of functional ability on the type of instruction was also assessed.…

The TESTFACT computer program and full-information factor analysis of test items were used in a computer simulation conducted to correct for the guessing effect. Full-information factor analysis also corrects for omitted items. The present version of TESTFACT handles up to five factors and 150 items. A preliminary smoothing of the tetrachoric…

IT WAS HYPOTHESIZED THAT SIMULATION AS AN INSTRUCTIONAL TECHNIQUE WOULD PRODUCE RESULTS SIGNIFICANTLY BETTER THAN THOSE OBTAINED IN CLASS GROUPINGS WHICH EMPLOYED ONLY LECTURE-DISCUSSION METHODS. FOUR HUNDRED AND FIVE 12TH-GRADE AMERICAN GOVERNMENT STUDENTS IN 2 HIGH SCHOOLS IN KANSAS WERE THE SUBJECTS. FIVE CLASSES, 225 STUDENTS, CONSTITUTED THE…

A computer-assisted simulation of experiments in eyelid conditioning was conducted as part of an introductory psychology course. This instructional format was then compared with a traditional instructor-led seminar and with a seminar in which computer-produced information obtained elswhere was used. A total of 120 students participated in 11…