ability.cov {datasets} | R Documentation |
Six tests were given to 112 individuals. The covariance matrix is given in this object.
ability.cov
The tests are described as
Bartholomew gives both covariance and correlation matrices, but these are inconsistent. Neither are in the original paper.
Barthlomew, D. J. (1987) Latent Variable Analysis and Factor Analysis. Griffin.
Barthlomew, D. J. and Knott, M. (1990) Latent Variable Analysis and Factor Analysis. Second Edition, Arnold.
Smith, G. A. and Stanley G. (1983) Clocking g: relating intelligence and measures of timed performance. Intelligence, 7, 353–368.
require(stats) (ability.FA <- factanal(factors = 1, covmat=ability.cov)) update(ability.FA, factors=2) update(ability.FA, factors=2, rotation="promax")