Using more complex items than those commonly employed within the information-processing approach, but still easier than those used in intelligence tests, this study analyzed how the association between processing speed and accuracy level changes as the difficulty of the items increases. The study involved measuring cognitive ability using Raven's…

Match-to-sample is a timed task in which a subject is presented with a visual stimulus (the probe) and must select a match to that stimulus (the target) from among an array of distractors. These tasks are frequently employed as tests of basic cognitive abilities and demonstrate consistent correlations with measures of intelligence. In the current…

This study examined whether children's growth on measures of fluid (Raven Colored Progressive Matrices) and crystallized (reading and math achievement) intelligence was attributable to domain-specific or domain-general functions of working memory (WM). A sample of 290 elementary school children was tested on measures of intelligence across three…

Three hundred and four participants in the Lothian Birth Cohort 1936 study took a validated IQ-type test at age 11 years and a battery of cognitive tests at age 70 years. Three tests of health literacy were completed at age 72 years; the Rapid Estimate of Adult Literacy in Medicine (REALM), the Test of Functional Health Literacy in Adults…

The transient enhancement of performance on spatial tasks in standardized tests after exposure to the first movement "allegro con spirito" of the Mozart sonata for two pianos in D major (KV 448) is referred to as the Mozart effect since its first observation by Rauscher, Shaw, and Ky (1993). These findings turned out to be amazingly hard to…

The study investigates the effects of intelligence, perceptual speed and age on intraindividual growth in attentional speed and attentional accuracy over the course of a 6-minute testing session. A sample of 193 subjects completed the Advanced Progressive Matrices and the Vienna Matrices Test representing intelligence, the tests Alertness and…

Individual differences in procedural and declarative learning of a sequence-learning task by 455 adolescents were measured and compared to one another and to scores on a performance battery. A framework is proposed to explain the results based on a combination of approaches to explain dissociations found in memory. (SLD)

First, third, fifth and eleventh graders were videotaped as they completed the Block Design Subtest of the WISC-R. Neither the order of placement of blocks within each design nor the degree to which children persisted in placing a given block correctly before moving to the next one evidenced developmental differences. (Author/RD)

Strategy use, task performance, and perceptions of difficulty were studied for 34 mildly retarded children and 34 who were not retarded. Results showed that retarded children rated tasks more difficult than nonretarded students and responded less well to brief task training. Metacognitive variables predicted recall performance independently of…

Working memory (WM) has been associated with the acquisition of arithmetic skills, however, the components of WM that underlie this acquisition have not been explored. This study explored the contribution of two WM systems (the phonological loop and the central executive) to mathematical performance in young children. The results showed that a…

Two studies were conducted to identify individual differences in the effect of instruction on strategies used to solve figural/numerical analogies. The first study assessed students' use of an appropriate rule for solving analogies and the stimulus attributes they incorporated. In Study 2, verbal protocols of selected subjects were analyzed.…

Relationship between stimulus type (numeric or verbal) and type of precocity (mathematical and verbal) was studied in 104 gifted young adolescents through tasks measuring working memory. The relationship between type of stimulus and type of precocity suggests underlying differences between verbally and mathematically precocious youth in memory…

Proposes a methodology and describes a test battery that synthesizes the psychometric strengths of maximal performance tests and the engagingness of typical-performance tests. Results with 31 adults show that the test measures the same abilities tapped by conventional cognitive tests but is viewed by examinees as less stressful, more interesting,…

Results from a study in which 25 deaf children and 25 hearing children completed a vocabulary test and a compound stimulus visual information task support the hypothesis that performance on cognitive tasks is dependent on compatibility of task demands with a coding orientation. (SLD)

Whether forward and backward serial recall performance reflects different codes, or different levels of processing complexity, was studied with 122 undergraduates. Results suggest that a phonological code was used for both forward and backward recall, and that a similar level of processing complexity was required for both. (SLD)