On baseline trials, when participants answered alone, the fMRI results indicated increased activity in the posterior brain areas dedicated to vision and perception. When they conformed to wrong answers, activation occurred in the same areas; however, when they chose to give the right answer and thus disagree with the group's unanimous wrong answer, the visual/perceptual areas of the brain were not activated. Instead, different areas of the brain became more active: the amygdala, an area devoted to negative emotions, and the right caudate nucleus, an area devoted to modulating social behavior.
Suggests that normative social influence occurs because people feel negative emotions, such as discomfort and tension, when they go against the group.