A microcomputer was inserted into two preschool classrooms—one large and one small—to examine the effects on children's free-play choices and social interactions. Sex differences were also examined. In both classrooms, the introduction of the microcomputer initially disrupted free-play activity patterns; over time, however, most free-play areas returned to baseline levels. Sex differences were apparent in both classrooms. In the large classroom, boys spent significantly more time at the microcomputer than girls. In the small classroom, there was a trend for girls to spend more time at the microcomputer than boys. Social interactions at the microcomputer were similar to interactions in other play areas of the two classrooms. Higher levels of positive social behaviors at the microcomputer compared to other play areas were not found in either classroom.

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