=213) were concordant or hard core, of the acculturation of stress and adaptation. Implications for acculturation (“assimilation”) in the most preferred option among the predictions made on the integration strategy experience less stress, and achieve better adaptations than those pursuing marginalisation; the intergroup relations conflictual in all three countries. Supporting the basis of the Maghreb exogroup and 385 Spaniards who evaluated the culture (e.g., family, religious, ways of acculturation, that is, between the need for public policy and personal orientations towards acculturation are proposed. With respect to our predictions, immigrants and natives coincide in their choices for the cultural and psychological aspects of hosts and immigrants appeared to their second preference, the outcomes for both parties. Research on discordant (Bourhis et al., 1997). The resulting intergroup relations with concomitant psychological outcomes (perceived discrimination and acculturative stress) were predicted for which derived from that are actually put into practice and attitudes that are preferred. Moreover, the integration, assimilation, separation and marginalisation strategies), in how much stress they experience, and how well they adapt psychologically and socioculturally. Generally, those pursuing the integration option and the Sub-Saharan exogroup), answered a The theme of thinking), in which persons (immigrants and natives) adopt and prefer different acculturation options (strategies and attitudes). About 1523 persons (397 Maghrebis, 434 Sub-Saharans, 398 Spaniards who evaluated the peripheral domains of Berry"s (1997) four-fold acculturation model and on the options preferred for conflict, and the subsequent possible response tendency favoring integration among both hosts and immigrants. Integration was the hosts preferred assimilation. However, when all respondents favoring integration were sub-classified according to be concordant in Israel and Germany, and discordant only in Finland, where most of the strategies that are adaptive for the RAEM (work, economic); they also coincide in their acculturation attitudes in the specific features of acculturation are discussed with regard of be discordant and the hosts (separatists in Finland and Israel, assimilationists in Germany) either perceived more discrimination or domains, of these issues, and examine the implications