An empirical validation of the 114 Worker Trait Groups of the Dictionary of Occupational Titles was performed by comparing the factor structure of the worker trait components of the 114 WTG's with the factor structure of a random sample of 800 of the 4000 jobs used as the basis for DOT. (Author)

The program briefly described in this paper represents an attempt to have the computer provide the counselor with a descriptive, item interpretation of the Edwards Personal Preference Schedule (EPPS). The rationale of the item analysis approach to a descriptive interpretation is that each of the 135 statements (nine for each of the 15 EPPS scales)…

The present investigation involves 600 personality questionnaire items. The 300 Guilford items comprise 78 marker clusters for 15 Guilford factors; the 300 Cattell items represent marker items for 17 Cattell factors. The study involved two major analyses. In the first, the 600 x 600 matrix was factor analyzed by the Principal Factor Method,…

This is a psychometric hoax paper, the purpose of which is to indicate once again the importance of cross-validation, particularly in the development of specially-keyed inventories. The junior author and the new psychometric method play critical roles in the study. Appropriate credit and references are present. (Author)

Various factors which influence the relationship between the Rasch item characteristic curve and the actual performance of an item are identified. The Rasch item characteristic curve is a new concept in test design and analysis. The Rasch test model provides information concerning the percent of students with a specified achievement level who…

Parameter estimation for Keats generalization of the Rasch model that takes account of guessing behavior is investigated. It is shown that no minimal sufficient statistics for the ability parameters independent of the difficulty parameters exist. (Author/JKS)

A FORTRAN program for maximizing and cross-validating split-half reliability coefficients is described. Externally computed arrays of item means and covariances are used as input for each of two samples. The user may select a number of subsets from the complete set of items for analysis in a single run. (Author/JKS)

Construct validity patterns of test-criteria and item-criteria correlations are shown to be inconsistent across samples. The results of an investigation of construct validity patterns on two published personality scales is presented. (JKS)

Item analysis is a very important consideration in the test development process. It is a statistical procedure to analyze test items that combines methods used to evaluate the important characteristics of test items, such as difficulty, discrimination, and distractibility of the items in a test. This paper reviews some of the classical methods for…

A schedule was developed for assessing the future outlook of hospitalized psychiatric patients and administered to samples of patients from two different hospitals. A factor analysis was done for each sample. (CK)