researchers analyzed 120 passages from across all seven major Potter books . These passages were read by participants while in an fMRI classroom . Each was rated on how negative or positive , and how arousing they were . tests showed passages rated high for arousal activated parts of the brain associated with emotion , including the left amygdala .
Researchers chose 120 passages from across all seven Harry Potter books . These passages were read by participants while in an fMRI scanner . Each was rated on how negative or positive , and how arousing they were . Scans revealed passages rated high for arousal activated parts of the brain associated with emotion , including the left amygdala .