| 研究実績の概要 |
In this study, we examine whether children’s tool selection is influenced by visual images of tool use presented by a model.Given that the children’scale error may be due to the immature inhibition of activated inappropriate size information, children with scale error show weaker prefrontal activation than those without scale error. Moreover, children would be required to exert more inhibitory control, as they need to inhibit the object image in which the tool was used inappropriately when they observed inappropriate tool/apparatus use compared to the appropriate tool/apparatus use.Children were shown one of two video clips; a model manipulated an appropriately sized tool into an apparatus (Correct condition; N =10, Mage= 39.4months) or an inappropriately sized tool into an apparatus but failed to use it in the end (Incorrect condition; N = 17, Mage = 41.18months). After watching either video, children were given two sizes of tools; one was size-appropriate, and the other was size-inappropriate. They were required to play using the tools. The results showed that the prefrontal activation during the task was increased children who do not exhibit scale error (SE) than those who exhibit SE in both conditions. Among the data from children with scale error, prefrontal activation was more active in the incorrect condition than in the correct condition, suggesting that the incorrect image may be required to inhibit children’ behavior more than the correct image.
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