Responds to W. Frawley's and J. Lantolf's comments on the Frauenglass and Diaz study concerning the interaction between private speech and cognition. Argues that Vygotsky's theory predicts a positive effect on children's problem solving activity. (HOD)

Observes 75 first- and third-grade children in their classroom mathematics seatwork to test assumptions drawn from Vygotsky's theory about the development of private speech and its relationship to task performance, attention, and motor behaviors accompanying task orientation. (HOD)

Examined whether indexes of verbal imprecision could be quantified and used to predict changes in fifth graders' problem-solving performance. Found that four types of verbal imprecision predicted improved performance: false starts and self-repairs, deletions, long pauses, and metacognitive comments. Results suggested that adopting a new approach…