The Timed Interval Categorical Observation Recorder (TICOR), a portable, battery powered microcomputer designed to automate the collection of sequential and simultaneous behavioral observations and their associated durations, was developed to overcome problems in gathering subtle interaction analysis data characterized by sequential flow of…

Videotaped group work lessons of an elementary school third grade class provide material for study of the non-verbal aspect of group behavior. A system of activity categories is developed and a typology of pupils' working methods in group study distinguishes types and characteristic forms of activity. The following activity categories are used in…

The study evaluates the effectiveness of a set of social studies activities in promoting cooperative interaction among junior high school students. A field experiment was designed to test three hypotheses: (1) groups which have previously worked together structure tasks more cooperatively than a newly formed group: (2) groups which have…