In the Blink of an Eye

Toddlers watching a video of a scene blinked less or not at all during the parts that engaged them. This is not surprising. What's interesting, though, is that this behavior can be used to determine what interests whom. Most toddlers, for example, stopped blinking right before an emotion-filled scene, but autistic toddlers showed no interest there and instead stopped blinking during sudden action: http://www.scientificamerican.com/article.cfm?id=think-before-you-blink