Twin language phenomenon in infant twins and family care

• Project/Area Number: 25671015
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Community health nursing
• Research Institution: Mie Prefectural College of Nursing (2015); Osaka University (2013-2014)
• Principal Investigator: Hayakawa Kazuo 三重県立看護大学, 看護学部, 教授 (70142594)
• Co-Investigator(Kenkyū-buntansha): AKIYAMA Akiko 三重県立看護大学, 看護学部, 准教授 (00633869)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 双子 / 乳幼児 / 言語発達 / 言語獲得 / 宇宙語 / 生活環境 / 母子環境 / ライフスタイル / 双生児 / 乳幼児期 / 育児環境 / 母子関係 / 家庭環境 / ファミリーケア / 生育環境

Outline of Final Research Achievements

Research results of this study were published in several research paper on twin language phenomenan.In sociability, the rate of percentile rank under 30 was highest in Dz femail(61.9%) and lowest in MZ mails(49.2). in home adaptation, the rate of percentile rank under 30 was highest inDz mails(55.0%), and lowest in Mz femails(38.2%). In school adaptation, the rate of percentile rank under 30 was highest in DZ oposite-sex pairs(48.1%), and lowest in MZ males(34.4%).In the score of social competence, the correlation coefficient was 0.817, for MZ pairs and 0.549 for Dz pairs in sociability, 0.659 for MZ pairas and 0.550 for Dz pairs, suggesting a possible genetic basis for this trait. This is a veryimportant result on twin language phenomenon.

Research Products

• [Journal Article] Zygosity Differences in Height and Body Mass Index of Twins From Infancy to Old Age: A Study of the CODATwins Project. (2015)
  • Author(s): Aline Jelenkovic, Yoshie Yokoyama, Reijo Sund, Chika Honda et al.
  • Journal Title: Twin Research and Human Genetics Volume: 18 Issue: 5 Pages: 557-570
  • DOI: 10.1017/thg.2015.57
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The Relationship Between Twin Language , Twins's Close Ties and Social Competence (2014)
  • Author(s): Chisato, Hayasi, Kazuo Hayakawa
  • Journal Title: Twin Research and Human Genetics Volume: 17(1) Issue: 1 Pages: 27-37
  • DOI: 10.1017/thg.2013.83
  • Peer Reviewed / Open Access
• [Journal Article] 父親の育児参加を予測する要因の検討 (2014)
  • Author(s): 林千里、早川和生
  • Journal Title: 日本地域看護学会誌 Volume: 16 Pages: 41-52
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] An Overniew of Multidisciplinary REsearch at the Osaka University Center for Twin REsearch (2013)
  • Author(s): Kazuo Hayakawa, Yoshinori Iwatani
  • Journal Title: Twin REsearch and Human Genetics Volume: 16(1) Pages: 217-220
  • Peer Reviewed
• [Journal Article] Infant Mortality Atributable to Birth Defects in Singlton and Twins in Japan (2013)
  • Author(s): Yoko Imaizumi, Kazuo Hayakawa
  • Journal Title: Gynecology & Obstetrics Volume: 3(2) Issue: 03 Pages: 2162-932
  • DOI: 10.4172/2161-0932.1000150
  • Peer Reviewed
• [Journal Article] Annual Trend in Zygostic Twinning Rates and Their Association with Maternal Age in Japan (2013)
  • Author(s): Yoko Imaizumi Kazuo Hayakawa
  • Journal Title: Gynecology & Obstetrics Volume: 3(6) Pages: 100-189
  • Peer Reviewed
• [Journal Article] Sudden Infａｎｔ Ｄｅａｔｈ Ｓｙｎｄｒｏｍ ｉｎ Ｔｗｉｎｓ ａｎｄ Ｓｉｎｇｌｅｔｏｎ (2013)
  • Author(s): Yoko Imaizumi, Kazuo Hayakawa
  • Journal Title: Ｐｅｄｉａｔｒｉｃｓ ａｎｄ Ｔｈｅｒａｐｅｕｔｉｃｓ Volume: ３（１） Pages: 100-140
  • Peer Reviewed
• [Presentation] 多胎児を産み育てる家庭への保健サービスを考える (2015)
  • Author(s): 早川和生、加藤則子、藤崎郁
  • Organizer: 第７４回日本公衆衛生学会
  • Place of Presentation: 長崎市
  • Year and Date: 2015-11-20
• [Presentation] 卵性別ふたごと単胎児の周産期死亡率の動向と死亡率に影響を及ぼす要因について (2015)
  • Author(s): 今泉洋子、早川和生
  • Organizer: 第２９回日本双生児研究学会
  • Place of Presentation: 金沢市
  • Year and Date: 2015-01-24
• [Presentation] 双生児研究法と傾向スコア分析による因果関係の推定 (2015)
  • Author(s): 尾形宗士郎、田中晴佳、早川和生、他
  • Organizer: 第２９回日本双生児研究学会
  • Place of Presentation: 金沢市
  • Year and Date: 2015-01-24
• [Presentation] 卵性別ふたご出生率と死産率１９９－２００８ (2014)
  • Author(s): 今泉洋子、早川和生
  • Organizer: 第２８回日本双生児研究学会
  • Place of Presentation: 大阪市
• [Presentation] 気分や感情と言語性エピソード記憶における遺伝・環境構造
  • Author(s): 田中晴佳、緒方宗士郎、早川和生、大村佳代子
  • Organizer: 第２８回日本双生児研究学会
  • Place of Presentation: 大阪市
• [Presentation] 聴力と認知処理速度に共通する遺伝要因
  • Author(s): 尾形宗士郎、加藤憲司、早川和生
  • Organizer: 第２８回日本双生児研究学会
  • Place of Presentation: 大阪市
• [Book] ふたごの子育て (2013)
  • Author(s): 板橋稼頭夫、上野昌江、早川和生
  • Total Pages: 125
  • Publisher: 母子保健事業団、
• [Book] 小さく生まれた赤ちゃん (2013)
  • Author(s): 楠田聡、早川和生
  • Total Pages: 122
  • Publisher: 母子保健事業団