Report of research to test the hypothesis that reflective students would be higher achievers in mathematics than impulsive pupils. An achievement test was developed to measure understanding of mathematical concepts and applications, ability to solve verbal problems and recall basic facts. Data suggest that reflective students obtain better…

Comparisons between a group of deaf children and normal-hearing controls on an extensive test battery revealed that the former group was clearly inferior both in general dynamic coordination and in visual-motor coordination. (MP)

Three experiments employed rectangles in stimulus identification tasks. It was concluded that the initial perceptual processing of rectangles is accomplished by separate dimensional analyzers operating in parallel. Observers adopt different decision strategies for negatively correlated sets and for single dimension sets when the number of…

The degree to which response complexity affects the ability of moderately mentally retarded adults to perform on a coincident timing task was examined in two experiments. Analyses of both constant and variable error scores suggested that an optimal exposure distance for the task existed. (Author)

The accuracy of sentence memory and the retrieval speed are jointly measured using a speed-accuracy trade-off paradigm. Results indicate that speed of retrieval from network representations is remarkably invariant over network size and distance, although increased sentence size results in a slight slowing in retrieval-speed parameters. (Author/PN)

A choice reaction time experiment tested the idea that the operations performed on symbols from different notational systems depend, not only on the interpretation of the symbols, but also on the symbol's notational characteristics or the ways in which they map the world. (Author)

Three experiments evaluated performance on a mental multiplication task and the adequacy of several different models of mental addition as extended to multiplication. Results are discussed in terms of a network-retrieval approach to mental arithmetic, the commonalities between addition and multiplication, and rule- versus retrieval-based…

Findings indicate that, when skimming, readers find it difficult to perceptually select from a passage information that is relevant to their goal in skimming. There was a reaction time advantage for verification of gist-relevant information as opposed to details, which tended to increase with reading rate. (Author/PN)