AmmonsR. B.AlprinS. I.AmmonsC. H.Rotary pursuit performance as related to sex and age of pre-adult subjects. J. exp. Psychol., 1955, 49, 127–133.
2.
BarnettC. D.CantorG. N.Pursuit rotor performance in mental defectives as a function of distribution of practice. Percept. Mot. Skills, 1957, 7, 191–197.
3.
EllisN. R.Object-quality discrimination learning sets in mental defectives. J. comp. physiol. Psychol., in press.
4.
EllisN. R.BarnettC. D.PryerM. W.Performance of mental defectives on the mirror drawing task. Percept. Mot. Skills., 1957, 7, 271–274.