Research evidence reveals that the processes of production and compre
hension are not functionally discrete before around 28 months. The
implications for the predictive validity of standardized screening tests
which involve production, particularly those using 'flexible object
naming', are considered. Examples of multiphasic and monophasic
language screening tests suitable for use with children in the 18-36
month age range are reviewed, and theoretical and empirical issues
underlying the development of the First Words and First Sentences tests
are explored.
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