Early identification of primary language delay is crucial to implement effective prevention programs. Available screening instruments are based on parents' reports and have only insufficient predictive validity. This study employed observational measures of preverbal infants' gestural communication to test its predictive validity for identifying…

Critically evaluates in terms of predictive and concurrent validity a widely used method of identifying children at risk in peer relations. This method emphasizes children's total rate of peer interaction, regardless of the quality or skillfulness of the interaction. Recommendations are given for future research in this area. (Author/DB)