Marcia proposed a model to describe the acculturation process of American ethnic minority populations, such as Native Americans.
Acculturation is the "process of learning and incorporating the values, beliefs, language, customs, and mannerisms of the new country immigrants and their families are living in," including actions that have an impact on one's health, like dietary choices, physical activity levels, and substance use.
Marcia’s (1966) theories concerning identity development can be used to understand developmental issues experienced by host and immigrant teenagers in interaction. Marcia presented a two-dimensional model that contrasts the extent of ethnic identity exploration with the degree of commitment to one's ethnic identity.
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