Reports study of possible determinants of sibling deidentification, or judgments of being different from one's sibling. Subjects were 383 university students from two-, and three-child families. (MS)

During a brief play period away from the mother, the responses of 10-month-old infants were observed as a function of two factors in a 2x2 design: first, whether the mother or the infant initiated the separation and second, whether the mother was visible or not during the separation. (Author/MS)

Twenty 18-month-olds were observed interacting with their mothers and fathers in a structured laboratory setting. Assessed were affiliation and attachment behaviors when the infant was alone with either the mother or father or with both parents and when stranger entered. (Author/MS)

The reaching behavior of 12 infants in the presence of solid objects and pictures of objects placed within and beyond possible contact distance was videotaped in three sessions at 15, 19, and 24 weeks of age. (Author/MS)

Inescapable shock given to weanling rats produced large deficits in adult escape behavior. Experience with escapable shock while a weanling immunizes the animal against the deficits produced by inescapable shock received as an adult. Implications of these findings for animal models of human depression are discussed. (Author/MS)

Recognition by infants, 13 and 22 weeks old, was tested by pairing novel stimuli with the familiarization stimulus at different points in an experimental session. Younger subjects showed no recognition of either two- or three- dimensional stimuli. Older subjects demonstrated more recognition in the three-dimensional condition. (MS)

Meaningfulness values, assessed via the production method, were obtained on 40 trigrams for 120 children, 40 each in second and sixth grade. These norms were subsequently used in a free-recall learning study. (MS)