Although item response models have grown in popularity in many areas of educational and psychological assessment, there are relatively few applications of these models in experimental psychopathology. In this article, we explore the use of item response models in the context of a computerized cognitive task designed to assess visual working memory…

A number of recent studies have used Meehl's (1995) taxometric method to determine empirically whether one should model assessment-related constructs as categories or dimensions. The taxometric method includes multiple data-analytic procedures designed to check the consistency of results. The goal is to differentiate between strong evidence of…

The taxometric method effectively distinguishes between dimensional (1-class) and taxonic (2-class) latent structure, but there is virtually no information on how it responds to polytomous (3-class) latent structure. A Monte Carlo analysis showed that the mean comparison curve fit index (CCFI; Ruscio, Haslam, & Ruscio, 2006) obtained with 3…

Background: Video conferencing (VC) technology has great potential to increase accessibility to healthcare services for those living in rural or underserved communities. Previous studies have had some success in validating a small number of psychological tests for VC administration; however, VC has not been investigated for use with persons with…

Autism Spectrum Disorders (ASDs) are characterized by the presence of impaired development in social interaction and communication and the presence of a restricted repertoire of activity and interests. While numerous treatments for ASDs have been proposed, very few have been subjected to rigorous scientific investigation. Hyperbaric oxygen therapy…

Learning Disabilities (LDs) affect a significant number of students in elementary and secondary school. In order for these students, along with parents and teachers, to understand the nature of their specific difficulties, and have equal opportunity in academic settings, a comprehensive psychological report containing properly informed…

The screening efficiency of 2 methods to convert Child Behavior Checklist (CBCL) assessment data into Diagnostic and Statistical Manual of Mental Disorders (4th ed. [DSM-IV]; American Psychiatric Association, 1994) diagnoses was compared. The Machine-Aided Diagnosis (MAD) method converts CBCL input data directly into DSM-IV symptom criteria. The…

The purpose of this study was to explore the perceptions of school psychologists and transition coordinators toward current involvement and importance of involvement of school psychologists in transition planning. An adaptation of a survey designed by Staab (1996) was used to assess the attitudes of school psychologists (N = 125) and transition…

This study examined efficacy of different story collection procedures with normally developing (N=10) and language disordered (N=6) preschool children. Factor analyses probed such possible interfering factors as home vs. school environments, familiarity of the story requester, coaxing cues, stimulus structure, and presence of such props as dolls…