222 uU Overview This study examines a central question, “How may the lifetime acculturative trajectories of Latino parents from adolescence to adulthood influence their ado- lescent children’s intentions to experiment with alcohol, tobacco and/or marijua- na?” To address this question, this study employed a novel methodology involv- ing a modeled approach to the study of acculturation as a temporal change process. An acculturation involves a change process that prompts adjustment and adaptation across time, location and context. Latino parents’ acculturation expe- riences constitute developmental pathways that forge the formation of their own cultural identity, which in turn may influence the formation of cultural and famil- ial norms which parents transmit to their children. In their roles as protectors and socializing agents for their children, parents will communicate various cultural messages that are derived from these cultural and familial norms. From an analysis of parental lifetime acculturative changes we identified four distinct lifetime acculturative trajectories: (a) major acculturative change—a large magnitude of change toward the U.S. mainstream culture, (b) minor acculturative change—a small magnitude of change; (c) no acculturative CHAPTER NINE LATINO YOUTHS’ SUBSTANCE USE INTENTIONS: PARENTAL ACCULTURATION TRAJECTORIES AND PARENT-YOUTH RELATIONSHIP FACTORS Felipe González Castro, 1 Stephen J. Boyd, 1 Meghan M. Garvey 1 and Joshua G. Kellison 1 1 Department of Psychology, Arizona State University.