The main objective of this study is to investigate the role of four different modes of representation in mathematical problem solving (MPS), and more specifically to develop a model, which provides information about the effects of these representations in the solution procedures of one-step problems of additive structures. Data were collected from…

Structural changes in an English as a Second Language (ESL) 30-item reading comprehension test were examined through principal components analysis on a small sample (n=31) of students. Tests were administered on three occasions during intensive ESL training. Principal components analysis of the items was performed for each test occasion.…

A promising new teacher self-efficacy instrument, the Ohio State Teacher Efficacy Scale (OSTES) (M. Tschannen-Moran and A. WoolfolkHoy, in press) was critically evaluated regarding its development and submitted to confirmatory factor analysis (CFA). Participants were 183 inservice teachers in Texas and Washington, DC, most of whom taught primary…

The purpose of the present study was to determine the ability organisation for adults of various ages through a hierarchial factor analysis of WAIS subtest intercorrelations for subjects from early adulthood through old age. (Author)

Factors identified for middle-class youngsters were found to be remarkably similar to those generated by their lower-class counterparts. (Authors)

Results of this research, while partially supportive of the general construct which the POI purports to measure, raises some questions about necessity of, or relevance of, the many scales of the inventory. (Authors/MB)

A factor rotation scheme is presented which has a property that is interesting for examining factor-structure hypotheses. Given several clusters of tests the orthogonal bounds scheme produces factors which contains these clusters in some optimal sense. (Author)

One in a series of nine articles in a section entitled, "Electronic Computer Program and Accounting Machine Procedures.

Cluster analysis, applied to Carroll's cognitive theory, indicates that the obtained clusters make intuitive sense and imply that taxonomy is possible. Moreover, some clusters are similar to those suggested by other theories, especially the theory of fluid and crystallized intelligence. (Author/CP)

Tucker's method of oblique congruence rotation is shown to be equivalent to a procedure by Meredith. This implies that Monte Carlo studies on congruence by Nesselroade, Baltes, and Labouvie and by Korth and Tucker are highly comparable. The problem of rotating two matrices orthogonally to maximal congruence is considered. (Author/CTM)

The intercorrelations among the 12 subtests of the WISC-R were analyzed for each of the 11 age groups in the standardization sample. Clusters were found that corresponded to the verbal and performance Scales. There was also some evidence of a third group of subtests, drawn from both scales. (Author/BW)

A hierarchical factor model of the Anxiety Sensitivity Index (ASI) (S. Reiss and others, 1986) was evaluated with 432 psychiatric outpatients and 32 people with no mental disorder. Results support a hierarchical factor structure of three lower order factors and one higher order factor. Implications for the assessment of anxiety sensitivity are…