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Sustained Attention and Intelligence.
Peer reviewed Peer reviewed
Tomporowski, Phillip D.; Simpson, Royce G. – Intelligence, 1990
The sustained attention of 16 mildly retarded and 16 nonretarded adults was assessed during 2 60-minute vigilance tests differing in memory demand. Performance of retarded subjects declined more rapidly in later stages than did that of the nonretarded subjects. Implications for the study of memory load are discussed. (SLD)
Descriptors: Adults, Attention, Cognitive Tests, Comparative Testing
Intelligence and RT: A Modified Hick Paradigm and a New RT Paradigm.
Peer reviewed Peer reviewed
Neubauer, Aljoscha C. – Intelligence, 1991
The relationship between speed of information processing (SIP) and psychometric intelligence was investigated by giving 60 college students (22 males and 38 females) 2 choice reaction time (RT) tests (modified Hick paradigm) and Raven's Advanced Progressive Matrices. Results support an association between intelligence and SIP. (SLD)
Descriptors: Cognitive Processes, College Students, Comparative Testing, Higher Education
Picture Encoding Speed and Mental Retardation.
Peer reviewed Peer reviewed
Merrill, Edward C.; And Others – Intelligence, 1987
Using a modified Posner "encoding function" methodology, group differences in semantic encoding speed were assessed under conditions in which subjects encoded pictures of common objects to determine physical identity matches, name identity matches, and superordinate identity matches. Results of primary interest revealed group differences in basic…
Descriptors: Adults, Age, Analysis of Variance, Comparative Testing
"In Vivo" Brain Size and Intelligence.
Peer reviewed Peer reviewed
Willerman, Lee; And Others – Intelligence, 1991
Magnetic resonance imaging was used to demonstrate that larger brain size (corrected for body size) was associated with higher intelligence quotient (IQ) for 40 right-handed college students grouped by high and average IQ and sex. Results suggest the relevance of brain size to intelligence test performance. (SLD)
Descriptors: College Students, Comparative Testing, Higher Education, Individual Differences
Comparison of Black-White Differences on the WISC-R and the K-ABC: Spearman's Hypothesis.
Peer reviewed Peer reviewed
Naglieri, Jack A.; Jensen, Arthur R. – Intelligence, 1987
The Kaufman Assessment Battery for Children (K-ABC) and the Wechsler Intelligence for Children-Revised (WISC-R) were compared with respect to the magnitudes of the average White-Black differences in standardized scaled scores and in raw scores. Subjects were 172 fourth- and fifth-grade children matched in Black-White pairs. (Author/LMO)
Descriptors: Blacks, Cognitive Processes, Comparative Testing, Grade 4
Spearman's Hypothesis Tested with Chronometric Information-Processing Tasks.
Peer reviewed Peer reviewed
Jensen, Arthur R. – Intelligence, 1993
Two studies with 658 white and 353 African-American elementary school children performing reaction time tasks are offered in support of Spearman's hypothesis about the relative size of the mean African-American-white differences on mental tests as a function of the tests' loadings on psychometric "g." (SLD)
Descriptors: Black Students, Cognitive Processes, Cognitive Tests, Comparative Testing
Influences of School Environment on the Academic Achievement Scores of Adopted and Nonadopted Children.
Peer reviewed Peer reviewed
Coon, Hilary; And Others – Intelligence, 1993
Data from the Colorado Adoption Project for 493 first-grade adopted and nonadopted children are used to separate parental intelligence quotient (IQ) from the effects of school environment. Several of the variables show direct environmental associations with reading and mathematics achievement independent of effects of parental IQ. (SLD)
Descriptors: Academic Achievement, Adopted Children, Comparative Testing, Educational Environment