Data collected from surveys can result in hundreds of variables and thousands of respondents. This implies that time and energy must be devoted to (a) carefully entering the data into a database, (b) running preliminary analyses to identify any problems (e.g., missing data, potential outliers), (c) checking the reliability and validity of the…

Several studies have reported high comorbidity for reading disability (RD) and psychiatric disorders. The aim of this study was to investigate the comorbidity of subthreshold and full psychiatric disorders with RD while comparing subgroups based on age of RD recognition (early vs. late). We analyzed data from 130 children with RD and 82 typically…

It has been suggested that tacit knowledge may be a good predictor of performance in college. The purpose of this study was to investigate the extent to which a situational judgment test developed to measure tacit knowledge correlates with predictors and indicators of college performance. This situational judgment test includes eight situations…

A numerical procedure is outlined for obtaining an interval estimate of true score. The procedure is applied to several sets of test data. (Author)

A simple, rigorous, small-sample statistical technique is described for testing the hypothesis that two sets of measurements differ only because of errors of measurement and because of differing origins and units of measurement. (Author)

We concern ourselves with the hypothesis that two variables have a perfect disattenuated correlation, hence measure the same trait except for errors of measurement. This hypothesis is equivalent to saying, within the adopted model, that true scores of two psychological tests satisfy a linear relation. Statistical tests of this hypothesis are…

PERSONALITY TRAITS OF TEACHERS AND PRINCIPALS ARE EXAMINED FOR THEIR EFFECTS UPON TEACHER-ADMINISTRATOR RELATIONSHIPS. THE EDWARDS PERSONAL PREFERENCE SCHEDULE, THE NATIONAL PRINCIPALSHIP STUDY, AND THE ADMINISTRATIVE PREFERENCE FORM WERE ADMINISTERED TO TEACHERS AND PRINCIPALS FROM AN URBAN SCHOOL DISTRICT IN MICHIGAN. RESULTS INDICATE THAT THE…

To determine if the ethnocentric perceptions of students would be influenced by participation in a 3-week social studies unit on "The Contributions of Minority Ethnic Groups to American Civilization," a study was made utilizing 114 students in five 12th grade social studies classes (three experimental and two control). The investigation attempted…