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151461 https://hdl.handle.net/2286/R.I.16027 http://rightsstatements.org/vocab/InC/1.0/ All Rights Reserved 2012 viii, 71 p. : 1 ill Masters Thesis Academic theses Text eng Price, Chara Dale Simpkins, Sandra Updegraff, Kimberly Menjivar, Cecilia Arizona State University Partial requirement for: M.S., Arizona State University, 2012 Includes bibliographical references (p. 49-59) Field of study: Family and human development Time adolescents spend in organized or informal skill based activities after school is associated with a variety of positive developmental outcomes. Little is known about how siblings might shape adolescents' motivation to participate in after-school activities. The current study applied the expectancy value model and ecological theory to understand if sibling behaviors were related to adolescents' after-school activities for 34 Mexican origin families. Qualitative and quantitative results suggested siblings engaged in five promoting behaviors (i.e., support, provider of information, role modeling, comparison, co-participation) and three inhibiting behaviors (i.e., babysitting, transportation, and negativity) towards adolescent activity participation. Furthermore, sibling behaviors differed by adolescent characteristics (i.e., cultural orientation, familism, and neighborhood) and sibling characteristics (i.e., gender, age). The results provide evidence of the various promoting and inhibiting socialization behaviors sibling might use to influence adolescents' activity motivation. Individual & Family Studies Psychology Education Adolescents after school activities Mexican American Siblings Brothers and sisters Student activities Mexican American teenagers--Family relationships. Mexican American teenagers Mexican American teenagers--Socialization. Mexican American teenagers Sibling behaviors and Mexican-origin adolescents' after-school activities