This study attempted to determine: (1) whether lower-order units (agent or agent-action) within the agent-action-recipient relationship exist in any functional way in the 1-word infant's comprehension of speech; and (2) whether the use of repetition and/or reduced length (common modifications in adult-to-infant speech) used to focus on these…

This study was designed to determine whether infants could perceive action role reversals when the direction of action is ruled out as a cue; whether infants consider inanimate, nonpotent objects to be unlikely agents; and whether both these discriminations could be reliably reflected in the heart rate response. (Author/SB)

The production and comprehension of pointing and their developmental relationship in the young child was examined in a study of 36 male and female 9- to 14-month-old infants. (CM)

Infant reaction to adult speech was studied through frame-by-frame analysis of sound films. Infants' actions were found to be synchronized with the organized speech behavior of the adults in his environment. (ST)

It is the contention here that the "prelinguistic" period is an important phase of the language acquisition process. Accordingly the research reported represents an attempt to begin mapping out the types of linguistically relevant information to which a young child attends. Specifically it is hypothesized that young children are…