Factor stability of the lateral preference schedule

The stability of the factor structure of the Lateral Preference Schedule (LPS) was investigated with a sample of 568 preadolescents to determine whether the original factor structure displayed with the adult standardization sample would be maintained. Instead of the six laterality factors initially reported, this preadolescent sample's factor analysis exhibited four factors. The findings suggested that care must be taken if the six factor solution of the LPS is presumed to exist when studying preadolescent samples.