ability.cov: Ability and Intelligence Tests
Description
Six tests were given to 112 individuals. The covariance matrix is
given in this object.
Source
Bartholomew, D. J. (1987) Latent Variable Analysis and Factor
Analysis. Griffin. Bartholomew, D. J. and Knott, M. (1990) Latent Variable Analysis
and Factor Analysis. Second Edition, Arnold.Details
The tests are described as
- general:
- a non-verbal measure of general intelligence using
Cattell's culture-fair test.
- picture:
- a picture-completion test
- blocks:
- block design
- maze:
- mazes
- reading:
- reading comprehension
- vocab:
- vocabulary
Bartholomew gives both covariance and correlation matrices,
but these are inconsistent. Neither are in the original paper.
References
Smith, G. A. and Stanley G. (1983)
Clocking $g$: relating intelligence and measures of timed
performance. Intelligence, 7, 353--368.