In "Opinions and Social Pressure," Asch describes an to find out the effects of group pressure. First, Asch and his colleagues collect a group of seven to nine young men, all college students, and assembles them in a classroom. The experimenter then explains to them that they will be visually comparing the lengths of three lines. He then shows the group two cards, one with a single vertical line, and the other with three vertical lines on it. The length of the three lines differ from three-quarters of an inch too an inch and three quarters; there is one that is the same as the other card. The young men are to choose the lines that match each other from the two differen