Shaw , 1962 , second-graders studied spelling in either high cohesive groups (in which no member rejected any other member , and some positive choices were represented ) or low cohesive groups (where no member chose any other member , and some rejections were represented . Groups worked together for three daily sessions , and completed tests on the material covered on the second and third days of this study period . A significant positive correlation between group cohesiveness and achievement was found in the second , but not...











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