Ability and Intelligence Tests

Description

Six tests were given to 112 individuals. The covariance matrix is given in this object.

Usage

data(ability.cov)

Details

Bartholomew gives both covariance and correlation matrices, but these are inconsistent. Neither are in the original paper.

Source

Barthlomew, D. J. (1987) Latent Variable Analysis and Factor Analysis. Griffin.

References

Smith, G. A. and Stanley G. (1983) Clocking g: relating intelligence and measures of timed performance. Intelligence, 7, 353–368.

Examples

data(ability.cov)
(ability.FA <- factanal(factors = 1, covmat=ability.cov))
update(ability.FA, factors=2)
update(ability.FA, factors=2, rotation="promax")