• Fifteen 1-year-old infants at high risk for later psychopathologic behavior were tested on the Piaget Object Scale. Their performance was compared to that of a matched group of controls at low risk. Results indicate a trend in the high-risk group toward lowered object scale performance. Affective styles were found to vary between the groups. The high-risk infants, particularly those with low scores on the object scale, demonstrated more intense anxiety.
Gamer E, Gallant D, Grunebaum H. Children of Psychotic MothersAn Evaluation of 1-Year-Olds on a Test of Object Permanence. Arch Gen Psychiatry. 1976;33(3):311-317. doi:10.1001/archpsyc.1976.01770030029004