Evaluate Asch's study.
Asch's study was a biased sample. It firstly was androcentric (an all male sample) making it ungeneralisable to females. Since it was an all American sample (America is an individualist society), it was also ethnocentric, making it ungeneralisable to collectivist societies. The test lacked ecological validity as it was artificial and not important to participants' belief systems. It lacks temporal validity since the experiment was in 1958, meaning the results are reflective of the conservative era (McCarthyism). This means it's not generalisable to our time, proved by research carried out in 1970 in which only 1 out of 396 P's conformed. Although the participants used were science and engineering students meaning they may have been less likely to conform. Finally, the test was unethical. The participants were deceived and told that the test was on line perception rather than social influence and were told the confederates were other participants. They also may have suffered from embarrassment and stress from the test.