The microgenetic emergence of cooperative play in 6-year-olds developmentally at-risk

Cooperative play was investigated by a controlled pre/post-test intervention design with 28 dyads of 6-year-old students developmentally at-risk. Selection was based upon cut-off scores on a language development test and a nonverbal IQ test, and same-sex pairs were matched within classrooms. Co-variables were: socio economic status, free play time in school and pedagogical quality of the classrooms. Each child was rated with respect to temperament. Play session 1 served as pretest for both research conditions. Then five play sessions of 20 min within 3 weeks took place in the experimental condition. Eight weeks after session 6 a play session took place in both research conditions serving as post-test. After microgenetic analyses of the data, ANCOVAʹs were computed of time played in collaboration, and proportion of pretend play and of deep collaboration. The results revealed that the level of collaboration had improved dramatically in the experimental condition only. Moreover, the findings showed that the length of time dyads spent cooperating, and how deeply they collaborated on tasks, was related to how agreeable and emotionally stable they were. Gender effects also came forward. No long-term intervention effects were found.