title: The relation between reactivity at 4 months and Behavioral Inhibition in the second year: Replication Across Three Independent Samples.
abstract: This paper examines the predictive relations between two infant temperamental biases assessed at 4 months and inhibited behavior during the first two years of life in three independent samples from two research laboratories. Although each sample used slightly different criteria for classifying infants, the results across samples were consistent. Infants of both genders who displayed high levels of motor activity and distress to unfamiliar events were more inhibited at 14 months of age. By 24 months there were significant sex differences: boys identified as high reactive were more inhibited than high reactive girls.
authors.affiliation: Department of Human Development and Quantitative Methodology, University of Maryland, College Park, MD 20742.
authors.forename: Nathan A
authors.initials: NA
authors.lastname: Fox
authors.affiliation: Department of Psychology, University of Massachusetts Boston, MA 02125.
authors.forename: Nancy
authors.initials: N
authors.lastname: Snidman
authors.affiliation: Department of Human Development and Quantitative Methodology, University of Maryland, College Park, MD 20742.
authors.forename: Sara A
authors.initials: SA
authors.lastname: Haas
authors.affiliation: Department of Human Development and Quantitative Methodology, University of Maryland, College Park, MD 20742.
authors.forename: Kathryn A
authors.initials: KA
authors.lastname: Degnan
authors.affiliation: Department of Psychology, Harvard University, Cambridge MA 02138.
authors.forename: Jerome
authors.initials: J
authors.lastname: Kagan
keywords: behavioral inhibition; infant reactivity; temperament