Child abuse and neglect: Effects on Bayley Scale Scores

Compared to controls, children who were diagnosed as victims of Nonaccidental Trauma or Failure to Thrive had depressed Bayley Scale Mental Index scores, p < .002and p < .0001, respecitvely. Failure-to-Thrive children also had depressed Bayley Scale Motor Index scores, p < .0001. Nonaccidental-Trauma children had Mental and Motor Scale range scores, as determined by differences between basal and ceiling items on the Mental and Motor scales, that were a function of measured Mental and Motor Index Scores. Specifically, Nonaccidental-Trauma children with lower Mental Index scores had higher Mental Scale range scores than Nonaccidental-Trauma children with higher Mental Index scores, p < .003. Control children had Mental Scale range scores that did not differ between the high-low Mental Index score conditions. On the Motor Scale, range scores of Nonaccidental-Trauma children in the highlow Motor Index score conditions did not differ. However, children with higher Motor Index scores had higher Motor Scale range scores than control children with lower Motor Index scores, p < .02. In addition, the Infant Behavior Record of the Bayley Scales revealed behavior ratings of Nonaccidental-Trauma and Failure-to-Thrive children that differed from Mental and Motor Scale scores on several dimensions. These differences may reflect differential effects of the Nonaccidental-Trauma and Failureto-Thrive conditions.This study was supported in part by Department of Health, Education and Welfare, Office of Child Development Grant OCD-CB-371. We wish to acknowledge the advice and encouragement of Roger V. Cadol, director, Developmental Evaluation Center of Denver General Hospital, and Michael J. Fitch, director, Child Study Project. A portion of this article was read at the American Association on Mental Deficiency Region IV Conference, Albuquerque, New Mexico, October 2, 1975.