A major focus of research on language acquisition in infancy involves experimental studies of the infant's ability to discriminate various kinds of speech or speech-like stimuli. This research has demonstrated that infants are sensitive to many fine-grained differences in the acoustic properties of speech utterance. Furthermore, these empirical…

The purpose of the present study was to determine whether temperament differences exist between infants who completed a visual perceptual/cognitive experiment and those who did not. A total of 14 Caucasian infants ranging in age from 5-15 months participated in the study. The subjects were placed in one of two groups (completers vs. noncompleters)…

Reviews literature on children up to age one to determine whether heart rate (HR) is a reliable, stable, and valid measure. Considers factors influencing resting HR and the Law of Initial Values, discusses information about response to stimulation and infant perception and affect obtained by using HR measures, and describes HR use in risk…