Disbelieve Single Psychology Studies

If a claim appears only as a single published study, treat it as provisional until independent, well‑powered replications accumulate; Jussim argues that replication failures, citation practices, selective reporting, and occasional fabrication can make a large fraction of published psychological claims false. He provides a simple decomposition and an empirical anchor (≈50% unreplicable) to justify a headline estimate (~75% false claims) for the field. — Adopting a public norm of provisional assent for single studies would reshape how media, policymakers, courts, and educators cite and act on psychological research.