The Relationship between Memory Span and Measures of Imitative and Spontaneous Language Complexity in Preschool Children

Abstract

Preschool children, aged 2 to 5 years, were given a memory task that required them to repeat a list of animal names and a sentence imitation task. A sample of their spontaneous speech was also recorded. Word span was found to predict sentence imitation scores across the whole preschool age range. Word span and chronological age (CA), together, also predicted the mean length of utterance in spontaneous speech in younger preschool children. In a replication with children aged 2 to 3 years, word span predicted mean length or utterance (MLU) better than both CA and mental age (MA). These results extend previous findings regarding the relationship between word span and language imitation to younger preschool children. They also support the notion of a memory constraint on early spontaneous language. Increasing mastery of linguistic rules appears to obviate a memory constraint on spontaneous language, at least with these measures.