This longitudinal study investigates the relation between recall memory and communication in infancy and later cognitive development. Twenty-six typically developing Swedish children were tested during infancy for deferred imitation (memory), joint attention (JA), and requesting (nonverbal communication); they also were tested during childhood for language and cognitive competence. Results showed that infants with low performance on both deferred imitation at 9 months and joint attention at 14 months obtained a significantly lower score on a test of cognitive abilities at 4 years of age. This long-term prediction from preverbal infancy to childhood cognition is of interest both to developmental theory and to practice.
Keywords
Recall memory; Deferred imitation; Joint attention; Pre-verbal communication; Cognitive development; PredictionThe present study explores whether early indices of declarative memory and nonverbal communication skills predict performance later in childhood. In a previous study, Heimann et al. (2006) documented a relationship between recall memory at 9 months (deferred imitation), communication skills at 14 months (joint attention (JA)), and gestural communication at 14 months. The current study investigates whether a similar relationship exists between these infant skills and linguistic/cognitive performance measured long after the infancy period-at 4 years of age.Theories of memory development originally proposed at least two major subsystems (e.g. Schacter & Moscovitch, 1984)-a procedural system available from birth and a declarative system that develops later in childhood. However, new test paradigms, such as deferred imitation, reveal that infants have some sort of nonverbal declarative memory already at 6-9 months, and possibly earlier (Barr, Dowden, & Hayne, 1996;Collie & Hayne, 1999;Hayne, Boniface, & Barr, 2000;Heimann & Nilheim, 2004;Meltzoff, 1988Meltzoff, , 1995Meltzoff & Moore, 1998 In the deferred imitation procedure developed by Meltzoff (1988), children are briefly exposed to a target action; the object is then removed without letting the participants touch or play with it. This means that in order to be successful in a deferred imitation task, children need to form an internal representation of the adult's act and store that representation in memory. Because the participants are not allowed to handle the object prior to the delay, they cannot rely on a previously executed motor pattern in order to remember the action. After a delay, the object is re-presented and the children have the opportunity to produce the target action without any verbal cues. Tests of deferred imitation under these strict conditions have been proposed to measure preverbal representational ability (Meltzoff & Moore, 1998;Piaget, 1952), recall memory (Bauer, Wiebe, Carver, Waters, & Nelson, 2003;Carver & Bauer, 2001;Courage, Howe, & Squires, 2004;Gross, Hayne, Herbert, & Sowerby, 2001;Meltzoff, 1995), and individual differences (Heimann & Meltzoff, 1996). Additionally, by means of this procedure...