Asch's Line Study and Variations
This page details Solomon Asch's famous conformity experiment and subsequent variations:
Asch investigated whether people would conform to an obviously incorrect majority. Using 123 American male undergraduates, confederates gave wrong answers on 12 of 18 trials. Key findings:
- One-third of participants conformed on critical trials
- 75% conformed at least once
Variations of the study explored different factors:
- Perrin and Spencer tested temporal validity, finding only 0.25% conformity
- Increasing confederates from 3 to 15 slightly increased conformity (29% to 32%)
- Smith and Bond found higher conformity in Fiji compared to Belgium, demonstrating cultural differences
- Unanimity reduced conformity to 5% when a confederate "friend" was present
- Task difficulty increased conformity rates
Highlight: Asch's study is a cornerstone of social influence theory, demonstrating how people may conform even when the majority is clearly wrong.
Example: In Asch's experiment, participants had to match line lengths. Despite the correct answer being obvious, many still conformed to the group's incorrect responses.








