ability.cov
Ability and Intelligence Tests
Six tests were given to 112 individuals. The covariance matrix is given in this object.
- Keywords
- datasets
Usage
ability.covDetails
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. 10.1016/0160-2896(83)90010-7.
Examples
library(datasets)
# NOT RUN {
require(stats)
(ability.FA <- factanal(factors = 1, covmat = ability.cov))
update(ability.FA, factors = 2)
## The signs of factors and hence the signs of correlations are
## arbitrary with promax rotation.
update(ability.FA, factors = 2, rotation = "promax")
# }
Community examples
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