 Participants demonstrated a higher detection rate of rapidly presented symbols when preparing to move, as compared to a control without movement.People shown extracts from films known to induce fear often overestimated the elapsed time of a subsequently presented visual stimulus, whereas people shown emotionally neutral clips (weather forecasts and stock market updates) or those known to evoke feelings of sadness showed no difference.It is argued that fear prompts a state of arousal in the amygdala, which increases the rate of a hypothesized "internal clock".