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.cov
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.

Aliases
  • ability.cov
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") # }
Documentation reproduced from package datasets, version 3.4.3, License: Part of R 3.4.3

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