bystander effect

Understand what bystander experiments measured, how a meta-analysis qualifies the effect, and why individual helping differs from help at an incident.

The 1964 murder of Kitty Genovese launched a landmark psychology experiment. Here's what Darley and Latané actually found — and why the original story was wrong.

Examine archival research on the 38-witness narrative, distinguish historical records from experiments, and learn how to evaluate a corrected account.