Item response theory (IRT) refers to a family of mathematical models which describe the relationship between latent continuous variables (attributes or characteristics) and their manifestations (dichotomous/polytomous observed outcomes or responses) with regard to a set of item characteristics. Researchers typically use parametric IRT (PIRT)…

The classification of intelligence has been a prime interest to many for over three-quarters of a century. The Wechsler scales of intelligence and the development of factor analysis have both played major roles in the shaping of psychometric thought. An examination of this joint history by means of a review of the factor analytic studies of the…

This study examined the underlying structure of the Subjective Stress Scale (SSS) by analyzing responses of 221 intellectually disabled adults. Results suggest that, although actual stressors vary, persons with mild intellectual disability are affected by the same major stress dimensions as the general population. Results also found the SSS…

Tests the validity of the Affect Balance Scale test (ABS) using a sample of 380 undergraduates at Oklahoma State University. Finds students' answers reflect duality of feelings. Concludes researchers must be cautious in their choice of scales comparing psychological well-being over the life course. (NL)

This study of 1,477 rating forms on students (grades 6-12) with mild disabilities attending mainstream vocational courses found that curriculum-based vocational assessment is a feasible means of assessing student career/vocational behaviors and skills. A two-factor solution representing work-related behaviors and generalized instructional outcomes…