The present study was undertaken to ascertain the test-retest reliabilities of the Annett Hand Preference Questionnaire and the Edinburgh Handedeness Inventory and to determine the relationship between the two tests and to attempt some assessment of their relative practical values. (Author/RK)

Instead of 12 factors, as originally specified in Cattell's foundation "personality sphere" studies of 30 years ago, it is herein suggested that possibly six clear-cut factors might have been extracted originally. The implications of this are examined, accompanied with recommendations for more accurate delineation of personality factors…