The use of elicited imitation as a measure of expressive grammar: a question of validity.
Elicited imitation has been suggested as an alternative to Developmental Sentence Scoring (DSS) as a means of measuring grammatical performance. Numerous investigators, however, have demonstrated that short-term memory is a confounding variable during elicited imitation. In the first experiment the imitative skills of 4 year old were assessed as a function of sentence comprehension and delayed imitation. The second experiment examined the relationship between the Carrow Elicited Language Inventory (CELI) and DSS under three imitative conditions; 0, 3, and 5 second delays. Results indicated that subjects were able to accurately repeat sentences which they did not understand as long as imitation was immediate. Delaying imitation 3 seconds adversely affected imitation of noncomprehended sentences while having no significant effect on comprehended sentences. A 3 second delay on the CELI also improved its correlation with DSS from -.77 (standard procedures) to -.90. The validity of elicited imitation as a test of expressive grammar is challenged.
D002663:Child Language; D002675:Child, Preschool; D006801:Humans; D007100:Imitative Behavior; D007804:Language Development; D007807:Language Tests / Q000592:standards*; D008570:Memory, Short-Term