Non-word repetition and language development in children with specific language impairment (SLI)

Non-word repetition has previously been found to correlate with language outcomes both in children who are language impaired and in those who are developing normally. This paper concerns a group of children identified as having specific language impairment (SLI) and follows the methods of Adams and Gathercole (2000) by taking children with the highest and the lowest non-word repetition scores at age 11. These children's language and literacy abilities were then compared. Despite the fact that high and low scorers were matched on Performance IQ tasks (Block Design and Picture Completion), all linguistic measures except for vocabulary assessments showed significant differences between the groups. The fact that these differences were present despite block design scores being identical for the two groups suggests that more than a general working memory deficit underlies the language difficulties. Furthermore, significant differences were noted on a digit-span task requiring processing and production of number words. A specific phonological memory difficulty may therefore be present over and above a subtle but more general processing limitation. The implications for SLI theory and practice are discussed.