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Age segregation is separation of people based on their age and may be observed in many aspects of some societies.〔L Steinberg, ''Adolescence'' (4th edition, 1996, )〕 Examples of institutionalized age segregation include age segregation in schools and age-segregated housing. There are studies of informal age segregation among adolescents.〔(SpringerLink - Journal Article )〕〔()〕 Age segregation in schools, age grading, or graded education is the separation of students into years of education (grades, forms) by approximately the same age. In the United States, graded education was introduced during 1848 to 1870.〔Frederick Dean McClusky, ''Introduction of Grading into the Public Schools of New England, Part II'',The Elementary School Journal, Vol. 21, No. 2 (Oct., 1920), pp. 132-145〕 Age grading in schools has significant impact on age segregation among adolescent peer groups.〔(SpringerLink - Journal Article )〕 Age segregation in the U.S. was a product of industrialization, Western formal schooling, child labor laws, social services agencies, and the rise of disciplines such as Psychology and Education. A combination of these caused a shift from family working as a unit to separation of economic activities and childcare emerged.〔Rogoff, B., Glida, M. and Chavajay, P. (2010). Children's Integration in Communities and Segregation From People of Differing Ages. Perspectives on Psychological Science, 5(4), pp.431-440〕 Some communities have different cultural practices and integrate children into mature activities of the family and community. This is common among Indigenous American communities. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Age segregation」の詳細全文を読む スポンサード リンク
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