New research gives one of the clearest answers yet to a question most organisations are still getting wrong: what actually helps international hires adapt – and decide to stay?
“As long as we believe the problem is a culture clash, we’re focusing on the wrong solutions.”
That’s the conclusion of Kinga Bierwiaczonek and Jonas R. Kunst, writing in Dagens Næringsliv about their landmark study published in Nature Communications this February. Their meta-analysis covers 5,066 effects, 1,114 studies, and 571,260 migrants across 73 countries of origin and 64 receiving countries. It’s the most comprehensive synthesis of migrant adaptation research ever conducted.
The findings challenge several comfortable assumptions. Some of them have direct implications for how organisations prepare managers – and whether they do at all.
Cultural distance doesn’t predict outcomes
The correlation between how culturally different origin and destination countries are – the abstract numerical gap on standard cultural indices – and how well someone adapts psychologically is r=-0.02. Statistically non-significant. Essentially zero.
Migrants from countries that score very differently on cultural dimensions don’t adapt worse than migrants from culturally similar countries. The distance score tells you nothing useful.
What does matter is whether the person understands the specific norms, expectations, and social codes of their new environment. Cultural understanding is not the same thing as cultural distance. A number that tells you Japan and Norway are culturally distant doesn’t tell you why a Japanese engineer might stay silent in a team meeting where a Norwegian colleague would speak up – or what a Norwegian manager should do with that silence.
Acculturative stress is the biggest drag
The strongest negative predictor across both psychological (r=-0.35) and socio-cultural (r=-0.30) adaptation outcomes is acculturative stress: the friction generated by navigating an unfamiliar cultural environment without adequate preparation.
This is the low-level cognitive load of not knowing how to read a situation. Not knowing whether to challenge or defer. Not knowing whether your directness is being read as confidence or rudeness. Not knowing whether the silence in a meeting means disagreement, reflection, or indifference.
That friction compounds. Over months, it shows up as disengagement, withdrawal, and eventually departure. And it’s largely preventable – not by teaching people about cultural differences in the abstract, but by giving them the specific preparation to navigate the actual situations they’ll encounter.
The Norwegian context deserves direct examination
There’s a tendency in Norwegian workplaces to interpret flat structures and “freedom with responsibility” as universally appealing. For many people, they are. For someone new to the country, without an intuitive grasp of when to push back, how to read informality, or what “you decide” actually means in practice, that same flatness can register as distance rather than trust.
This isn’t a criticism of how Norwegian workplaces are organised. It’s an observation that cultural norms that feel like open invitations to those who grew up with them can feel like ambiguous signals to those who didn’t. The research supports this: what protects people from acculturative stress is not removing cultural difference, but providing the preparation to navigate it.
The most surprising finding: supervisor support
The researchers describe this explicitly as a finding not identified in any previous meta-analysis at this scale.
Supervisor support predicts both psychological (r=0.26-0.29) and socio-cultural adaptation with consistent effect sizes across contexts. In fact, the data shows that support from a direct manager can matter more than support from family, friends, or people from the same home country.
The relationship between an international hire and their direct manager is the most modifiable structural factor in how well that person settles in. Not the onboarding programme. Not the buddy system. Not HR. The manager.
This is where most organisations stop. They read the finding, nod, and move on. But “supervisor support matters” is not an action. The harder question is: what does useful support actually look like across a cultural gap the manager may not be equipped to navigate?
Knowing it matters isn’t enough
The Oslo Business Region found in 2024 that 78% of foreign employees in Oslo wished they had more help connecting when they arrived. That’s not a satisfaction score – that’s 78% of your international hires arriving under-resourced for the most consequential phase of their tenure.
The Nature paper tells us the consequences in precise terms: elevated acculturative stress, reduced adaptation, predictable departure.
The levers are specific and actionable. Reduce acculturative stress through genuine cultural preparation – not country fact sheets, but the specific norms, communication styles, and decision-making patterns the person will actually encounter. Invest in manager readiness. Prioritise social connection in the first 90 days.
Most organisations aren’t doing this because they’ve been looking at the problem the wrong way. Bierwiaczonek and Kunst are right: as long as the frame is “culture clash,” the solutions will be superficial.
Where CultureFlow fits
The research identifies supervisor support and reduced acculturative stress as the two highest-leverage interventions. Both require the same underlying thing: specific, contextual cultural preparation – not generic awareness, but the kind of understanding that helps a manager know why their new hire from India is deferring to authority in meetings even when they disagree, or helps a new hire from Germany understand that Norwegian directness about process doesn’t mean what German directness about process means.
That’s what CultureFlow Connect builds. Research-grounded briefings – drawing on the World Values Survey, peer-reviewed cross-cultural indices, and GLOBE research – that prepare both sides of a professional relationship for the specific dynamics they’re about to encounter.
The paper tells you where the leverage is. We built the tool that applies it.
Bierwiaczonek, K. et al. “A Meta-Analysis of Social and Contextual Correlates of Migrant Adaptation to Living in Receiving Societies.” Nature Communications 16, 11231 (2025). DOI: 10.1038/s41467-025-67468-z