Brain Size and Intelligence

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Description

Willerman et al. (1991) conducted their study at a large southwestern university. They selected a sample of 40 right-handed Anglo introductory psychology students who had indicated no history of alcoholism, unconsciousness, brain damage, epilepsy, or heart disease. These subjects were drawn from a larger pool of introductory psychology students with total Scholastic Aptitude Test Scores higher than 1350 or lower than 940 who had agreed to satisfy a course requirement by allowing the administration of four subtests (Vocabulary, Similarities, Block Design, and Picture Completion) of the Wechsler (1981) Adult Intelligence Scale-Revised. With prior approval of the University's research review board, students selected for MRI were required to obtain prorated full-scale IQs of greater than 130 or less than 103, and were equally divided by sex and IQ classification.

Usage

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data("BrainIQ")

Format

A data frame with 40 individuals and the following 7 variables.

Gender

Participant's gender.

FSIQ

Full Scale IQ.

VIQ

Verbal IQ.

PIQ

Performance IQ.

Weight

Body weight.

Height

Body height.

MRI_Count

MRI pixel count (brain size).

Source

Willerman, L., Schultz, R., Rutledge, J. N., & Bigler, E. (1991). In vivo brain size and intelligence. Intelligence, 15, 223-228.

Examples

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