REALITYWIPE

RESEARCHERS

The Science of Psychological Safety: Why Smart People Go Silent at Work

3 the researchers behind it — 'I didn't speak up because I didn't want to look stupid' and 'there's no point raising this — nothing ever changes' feel like personality quirks or pe

Harvard Business School

Amy C. Edmondson

Known for:Coining and empirically establishing psychological safety as a team-level climate variable — the foundational work showing that interpersonal risk climate, not personality, explains whether people speak up at work

Key findings

  1. 1999

    In a study of 51 work teams, Edmondson found that teams high in psychological safety — a shared belief that the team is safe for interpersonal risk-taking — showed significantly greater learning behavior and better performance, establishing safety as a team-climate variable distinct from individual trust. ↗

  2. 2003

    Extending the research to hospital nursing teams, Edmondson found that higher-performing units reported more errors than lower-performing ones — because psychological safety made nurses willing to surface mistakes rather than hide them, inverting the usual assumption that fewer error reports means fewer errors. ↗

Yale School of Public Health

Ingrid M. Nembhard

Known for:Research on leader inclusiveness in healthcare teams — showing that specific verbal behaviors from leaders can close the status-based psychological safety gap that suppresses the voices of lower-status team members

Key findings

  1. 2006

    In a study of 23 neonatal ICUs with Edmondson, Nembhard found that lower-status professionals had lower psychological safety than higher-status ones, and that 'leader inclusiveness' — verbally inviting, acknowledging, and expressing gratitude for contributions — specifically reduced this status penalty. ↗

University of Virginia Darden School of Business

James R. Detert

Known for:Research on implicit voice theories — the pre-formed beliefs about whether speaking up to authority is safe or useful, which act as automatic filters that suppress voice before employees even reach the moment of decision

Key findings

  1. 2011

    With Edmondson, Detert found that workers' decisions to voice or stay silent are often made before they reach the conversation, driven by implicit voice theories — internalized schemas about when speaking up to authority is safe, useful, or appropriate — acting as automatic pre-filters on the decision to speak. ↗

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