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Stifter, Cynthia A.; Fox, Nathan A. – Developmental Psychology, 1990
Longitudinal data indicated a significant relation between five-month vagal tone and negative reactivity elicited in the laboratory and maternal ratings of activity level and smiling behavior. Newborn vagal tone predicted maternal ratings of frustration and fear. Moderate stability was found for infant reactivity. (RH)
Descriptors: Age Differences, Heart Rate, Infant Behavior, Infants

Riese, Marilyn L. – Developmental Psychology, 1987
The predictive relation between neonatal behavior and temperament at 24 months was examined for 67 infants selected from the full socioeconomic status (SES) distribution. Initial ratings were made when the infants were one to four days old. Irritable neonates were rated as more upset, less attentive to stimuli, and less responsive to the staff at…
Descriptors: Affective Behavior, Attention Control, Conflict, Interpersonal Competence