Research on acculturation gaps has traditionally focused on parent–child dyads and the negative implications for youths’ psycho-social adaptation. The current study explored the impact of acculturation gaps in Turkish immigrant couples (N = 121) on each spouse’s acculturation stress. Wives and husbands reported their acculturation across two domains (language and identity) and dimensions (German and Turkish), and two facets of stress (homesickness and upholding traditions). Actor–partner interdependence models were used to estimate effects (Cook & Kenny, 2005). While homesickness was a burden for both partners, upholding traditions was not an immense stressor but was higher among husbands. Host culture adaptation was associated with lower levels of homesickness among wives and higher levels of stress with traditions among husbands. Heritage culture maintenance was associated with lower levels of stress with traditions among husbands. Overall, there were very few partner effects although better Turkish language abilities of wives were related to less homesickness among husbands. Acculturation gaps were either unrelated to spouses’ acculturation stress or associated with lower levels of stress. Results are discussed with respect to an interpersonal perspective on immigrants’ acculturation strategies. We promote the idea that biculturalism can be achieved within the couple. © The Author(s) 2015

Acculturation stress Gender differences Acculturation gap language immigration/migration Biculturalism Ethnic identity national identity

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