Interest in quantifying nonverbal variables in human interaction has led to the development and application of several nonverbal observation systems. The authors present a selective overview of these approaches, briefly explaining the major assumptions in terms of their differences and similarities. Drawing largely from their own experiences in…

This report describes the third year of the national Follow Through Classroom Observation study. The aims of the study were: (1) to assess program implementation at one site for each of 12 sponsors; (2) to search out the relationships between child outcomes and teaching-learning processes; and (3) to estimate which programs incorporate processes…