Evidence
The research
Every answer here carries a rating for how much the literature actually supports it. Most relationship questions score limited or contested, and that is not us hedging. It is the honest state of the field.
- Strong evidence
- Multiple independent studies, including replications or meta-analyses, point the same way. Browse these
- Moderate evidence
- Several studies support this, but samples are limited or findings vary by population. Browse these
- Limited evidence
- Early, small, or single-study evidence. Treat this as a reasonable hypothesis, not a settled fact. Browse these
- Contested
- Credible researchers disagree, or the evidence points in conflicting directions. Browse these
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