Asch 1956 - the "lines" experiment
Method - repeated measures design; 123 American male students; voluntary sample; 1 or 2 participants in each group - rest confederates
Results - only 25% never conformed, 75% of the participants conformed at least once. In the control experiment with no confederates only 1% gave the wrong answer
Conclusion - reasons for conformity from participants were: distortion of perception (a small number actually claimed to seeing the lines the same way as the confederates), judgement (doubted their own view) and action (privately maintained own views)
Evaluation
Large sample, high internal validity
Andocentric and ethnocentric bias, low ecological validity, deception, Perrin and Spencer - old study
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