E: US was in the grip of McCarthyism, a period when people were scared to go against the majority and so more likely to conform. Perrin and Spencer attempted to repeat Asch's study. In their initial study they obtained only one conforming response out of a total of 396 trials where a majority unanimously gave the same wrong answer. However, where they used youths on probation as participants and probation officers as the confederates, they found similar levels of conformity to those found by Asch back in the 1950s.