Moderately and severely learning disabled boys were evaluated in terms of constructs of reflection-impulsivity and field dependence-independence, which concerns cognitive style and whether one is able to perceive and utilize discrete elements of his perceptual field. (KW)

Findings of the present inquiry indicate the relevance of cognitive considerations in studies of time perception. (Authors)

A study to determine whether the differential development of conceptual tempo can predict preferences. Conceptual tempo predicted preferences in color-form sorting among 67 children ranging in age from 44 to 65 months. (WY)

The relationship between cognitive tempo and time estimation as measured by reproduction and production was investigated in boys. Impulsives underestimated time intervals more than reflectives when measured reproductively. Impulsive boys' response times were significantly correlated with their estimates of reproduction times. The physiological…

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…

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)

Analysis of 22 mean response times (RTs) for children with specific language impairment (SLI) found that SLI children's RTs increased linearly as a function of RTs for age-matched non-SLI control children. Intergroup differences in processing speed between children with and without SLI reflect some general component of cognitive processing.…

A review of 45 published studies yielded 518 pairs of response times (RTs) consisting of a mean RT for persons with mental retardation and the corresponding mean RT for persons without mental retardation. RTs of individuals with mental retardation increased linearly as a function of RTs for persons without mental retardation in corresponding…

Studied the effects of extending the pauses between teacher questions and naming a student to respond (wait time) in 2 experiments involving 194 college students. Extending wait time from 3 to 6 seconds actually lowered higher-level cognitive achievement. (SLD)