Studied were the responses of infants to new toys presented with either positive, negative, or neutral affective displays by mothers. Responses to stimulus toys were compared with responses to free play toys. Maternal displays influenced responses only to stimulus toys. (PCB)

This study explored the relation between mother-infant coordinated interpersonal timing, an automated microanalytic measure of dyadic vocal coordination, and maternal sensitivity. Thirty-four mothers and their developmentally normal 4-month-old infants were audio recorded during a 20-minute laboratory vocal interaction session, which was later…

Experiment demonstrates that the reinforcing efficacy of visual feedback is related to its degree of redundancy. (WY)

Four-month-old infants' stimulus preferences were assessed using an operant paradigm with mobile reinforcers of different colors (blue, green). (Author/MP)

Investigates whether five-week-old infants' attention to a schematic face would increase as the velocity of its oscillating eye dots increases. Twenty-four infants served as subjects. (MP)

Examined whether early differences in stress reactivity were related to self-recognition at 18 months. Found that self-recognition was related to greater cortisol response and less rapid quieting at 6 to 18 months, whereas cortisol and quieting responses of 2- to 4-month-olds did not differentiate self-recognizers and non-self-recognizers,…

In the studies presented here, infants' understanding of others' attention was assessed when gaze direction cues were not diagnostic. Fourteen-, 18- and 24-month-olds witnessed an adult look to the side of an object and express excitement. In 1 experimental condition this object was new for the adult because she was not present while the child and…

The relationship between neonatal visual information-processing and the burst-pause pattern of nonnutritive sucking was explored. (JMB)

Based on PhD dissertation submitted to the University of California, Los Angeles.