Milada Krejci, Kai Wada, Miyo Nakade, Hitomi Takeuchi, Teruki Noji, Tetsuo Harada (2011) Effects of Video Game Playing on the Circadian Typology and Mental Health of Young Czech and Japanese Children, Psychology 2011. Vol.2, No.7, 674-680
The objective of this study is to examine the effects of video game playing on sleep-wake cycles and mental health of young Czech and Japan children. A cross-sectional survey with 497 Czech children (240 girls, 257 boys; mean age of 4.60 years; 49 ̊ – 51 ̊N) and 599 Japanese children (314 girls, 285 boys: 3.79 years; 33 ̊N) from 20 kindergartens and nursery schools. Habitual video game playing in the evening may make children more evening-typed and it may also be speculated to make them more aggressive in both countries.
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