| Project/Area Number |
19330149
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Educational psychology
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
南 徹弘 大阪大学, 人間科学研究科, 教授 (40030043)
安田 純 大阪大学, 人間科学研究科, 助教 (30324734)
志澤 康弘 大阪大学, 人間科学研究科, 助教 (60372603)
赤井 誠生 大阪大学, 大学教育実践センター, 教授 (90192872)
新居 佳子 大阪大学, 大学教育実践センター, 助教 (90420421)
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| Co-Investigator(Renkei-kenkyūsha) |
MINAMI Tetsuhiro 大阪成蹊短期大学, 児童教育学科, 教授 (40030043)
YASUDA Jun 大阪大学, 大学院・人間科学研究科, 助教 (30324734)
SHIZAWA Yasuhiro 平安女学院大学, 子ども学部, 准教授 (60372603)
AKAI Seiki 大阪大学, 大学教育実践センター, 教授 (90192872)
ARAI YOSHIKO 大阪大学, 大学院・人間科学研究科, 特任研究員 (90420421)
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| Research Collaborator |
YAMADA Kazunori 京都大学, 野生動物研究センター・日本学術振興会, 特別研究員
KATO Mayuko 大阪大学, 大学院・人間科学研究科
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2007: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
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| Keywords | 発達加速現象 / 初潮 / 思春期 |
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| Research Abstract |
The material collected in February2008 consisted of a random sampling of 41,798 schoolgirls (9-15 years old). The mean age at menarche of Japanese schoolgirls was found to be 12.189 years (12 years and 2.3 months.) In comparison with the mean age of 2005, the mean age had not significantly changed. The mean menarcheal age in Japan was thought to be decreasing since the 1990s. The trend towards early maturation in Japan had obviously leveled off. The age of menarche serves as a reliable instrument with which the health practice and socio-economical difference of each region may be measured.
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