This paper reports a transition from affective to linguistic meaning in 15-month-old infants. Behaviour regulation in the context of a social referencing procedure is used as a measure of the meaning of stimulus messages for infants. Of particular interest is the extent to which receptive vocabulary predicts behaviour regulation by language and paralanguage. Approving and disapproving lexical content was completely crossed with approving and disapproving facial and vocal paralanguage to produce stimulus messages. At the group level, the behaviour of 15-montholds was better regulated by paralanguage than by lexical content. However, receptive vocabulary was a significant predictor of the relative primacy of language and paralanguage: infants who understood the lexical content of stimulus messages were better regulated by lexical content than by paralanguage. These data suggest a transition from affective to linguistic meaning in comprehension that parallels the transition from affective expression to expression that integrates affect and language.The infant's earliest communicative experiences have been described as 'primordial sharing encounters' which progress toward ever greater differentiation between the infant and the external world (Werner & Kaplan 1963. This process of differentiation makes it possible for the infant to comprehend the referential function of language. With the comprehension of reference comes the acquisition of a receptive vocabulary and this acquisition represents a watershed in the bases of meaning. This paper explores a transition from affective to linguistic meaning in the second year of life.This transition is conceived of as parallel to a transition in productive communication from expression that is predominantly affective to expression that integrates affect and language (Bloom 1993, Bloom Beckwith & Capatides 1988. Children reach this transition in expression concomitantly with a rapid increase in productive vocabulary. The analyses of Bloom et al. (1988) and Bloom (1993) reveal the difficulty with which children first coordinate expression in the affective and linguistic modes simultaneously: when children begin producing their first words, affect expression falls below baseline just prior to articulation. Also, for children identified as late word learners, there is a decrement in the overall frequency of affect expression during the period from about 17 to 21 months as they undergo a rapid increase in vocabulary production. Bloom's (1993) interpretation is that, for reasons of processing limitations, there is a period of transition in the co-ordination of these * A portion of this research was presented at the International Conference on Infant Studies, 1998. Franco (1997) describes the development of meaning in infancy as progressing from sensorial to affective (in the newborn), from affective to pragmatic (in the 3-to 4-month-old), and from pragmatic to referential (late in the first year).
HHS Public AccessImportantly, prelinguistic meanings are often conveyed par...