Asch Conformity Experiments

Line-judge series showing people deny clear perception to agree with a unanimous majority about a third of the time.

Specifications & Metrics

About 75 percent of participants conformed at least once; a quarter never did; errors averaged about 37 percent on critical trials.
One dissenting ally cut conformity sharply, showing unanimity, not group size, carries the pressure.
A 2023 replication with modern samples found comparable error rates, around a third of critical trials.