幼児におけるじゃんけんの勝敗判断に関する発達段階の評価.

The Rock-Paper-Scissors game is used as a way of making specific decisions based on incidental outcomes. The present study aimed to investigate how children acquire the underlying cognitive functions to play the game relating to understanding of "three-way deadlock structure" through developmental processes. There were 569 children (age range ＝ 12-83 months) who were evaluated. In this study, the task consisted of three subtasks:(1)" understanding rock-paperscissors symbols";(2)" judgment of winning"; and(3)" judgment of losing". We evaluated the children's developmental levels using the Kyoto Scale of Psychological Development-2001(KSPD2001). Children aged 2.6 years had a 50% success rate in passing the first task, for the second task the age at which the 50% success rate was achieved was 4.8 years, and for the third task it was 5.4 years. Significant correlations were confirmed between the developmental age assessed in the KSPD2001 and the five stages of understanding the game. The results suggest that this task is useful to evaluate specific children's stages in understanding the game, and to assess developmental levels of young children. [ABSTRACT FROM AUTHOR]