抄録
Children's performance in a go/no-go task was surveyed in 1969, 1979 and 1998 in Japan, and in 1984 in China. From the data collected, the subjects were classified into five types as regards the cerebral activity(melancholic, choleric, inhibitory, phlegmatic, and sanguine types)in accordance with the model proposed by Pavlov, Miyata and Masaki. The distribution of the five types in 1998 in Japan was found to be similar to that in 1979 in Japan, but different from those in 1964 in Japan and in 1984 in China. This difference is speculated to be caused by the change in the nature of children's play in which the amount of communication necessary to develop meaningful human relationships with other people has decreased.
