Researchers discover pupil dilation patterns synch up

A new study has found that patterns of pupil dilation can reveal when two minds'connect.' Using eye-tracking technology, researchers have found collective pupillary synchrony between speakers and listeners were greatest during emotional peaks of a narrative – and decreased as the story became less engaging. The results of the experiments have suggested that speakers who are highly expressive are more likely to evoke pupillary synchrony - allowing them to keep their audiences's attention. Pupil dilation can occur during many different settings. When you enter a dark cinema, your pupils will automatically dilate to let more light in.