We investigated whether preschoolers' social-emotional competencies predict their peer relationships and academic achievements during grade one. Measures of cool and hot executive functions, theory of mind, social-problem-solving, and peer acceptance were administered to a sample of 48 preschoolers (M = 77.91 months). Academic achievement and peer acceptance were assessed at the end of Grade 1. A path analysis revealed that cool and hot executive functioning during preschool had a direct impact on academic achievement in elementary school and an indirect effect on peer acceptance via the theory of mind and social-problem-solving, respectively. Further, peer acceptance in preschool had a positive direct effect on peer acceptance during grade one. These findings indicate the vital role of social-emotional competencies on peer relationships and academic achievement. Future study should include additional measures to examine the effect of preschooler's cool and hot executive functions on later school adjustment. ARTICLE HISTORY

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Recent studies indicate the need to investigate the sources of toddlers’ understanding of another person's pretense. The present study is a cultural and longitudinal extension of the work of Lillard and Witherington (2004), who claimed that mothers modify their behaviors during pretense and that the some of these behavior modifications help their toddlers understand maternal pretense. Experiment 1 investigated whether mothers would change their behaviors during pretense with a sample of 31 Japanese mother–infant pairs. Experiment 2, with a subsample of 20 mother–child pairs who had participated in Experiment 1, examined whether the maternal behavior modifications at 18 months predicted their toddlers’ understanding of pretense at 24 months. The results of Experiment 1 indicated that Japanese mothers smiled more frequently, gazed at their toddlers longer, used sound effects more frequently, and engaged in more frequent snack-related actions in a “pretense condition” than in a “real condition.” In addition, some of these behaviors were significantly related to their toddlers’ apparent understanding of pretense. Experiment 2 showed that both the frequency of maternal smiles and the number of sound effects in the pretense condition at 18 months predicted toddlers’ understanding of the pretense enacted by a strange adult at 24 months. This research indicates the impact of maternal behavior modifications during pretense on the development of symbolic thought in the 2nd year of life.

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