integration hypothesis
Definition
integration hypothesis refers to the theory that migrants and ethnic minority group members achieve optimal adaptation outcomes, such as psychological health and socio-cultural competence, through simultaneous high engagement with both heritage culture and mainstream culture. The hypothesis is fundamentally an interaction hypothesis, properly tested by examining whether the combination of both cultural orientations predicts adaptation outcomes above and beyond their individual main effects. Meta-analytical evidence demonstrates that the positive effects attributed to integration are primarily driven by mainstream culture orientation rather than by the synergistic combination of both orientations, with interaction terms explaining close to zero variance (f² < .009) when tested using rigorous multivariate approaches. Prior meta-analyses using bivariate approximations—including summative scores, multiplicative scores, midpoint splits, and Euclidean distance—substantially inflated perceived integration effects by conflating main effects with interactions, yielding results of unknown accuracy.
Related Terms
Applications
Integration Hypothesis and Mainstream Culture Orientation
Meta-analytical evidence reveals that mainstream culture orientation is a more reliable and consistent correlate of positive adaptation outcomes than integration or heritage culture orientation. The positive effects previously attributed to integration in meta-analyses are substantially driven by mainstream culture orientation alone, which explains roughly as much variance in adaptation outcomes as models including both orientations plus an interaction term.
Sources: Bierwiaczonek (2025)
Integration Hypothesis and Heritage Culture Orientation
Heritage culture orientation shows inconsistent associations with adaptation outcomes—sometimes positive and sometimes negative—and this inconsistency is inherited by the integration hypothesis since integration operationalizes the combination of both orientations. The heterogeneity observed in integration effects can be attributed to the unpredictable effects of heritage culture orientation rather than to country-level contextual factors.
Sources: Bierwiaczonek (2025)
Integration Hypothesis and Acculturation Strategies
The integration hypothesis posits that the integration strategy—defined as simultaneous and active engagement with both heritage and mainstream cultures—should predict better adaptation than alternative strategies. Bivariate operationalizations of integration using approaches like summative or multiplicative scoring cannot distinguish between endorsing both orientations simultaneously and endorsing only one orientation, potentially confounding integration with other single-orientation strategies.
Sources: Vu & Bierwiaczonek (2025)
