Move your hands to remember!

[Added December 1998]
Why do we gesture when we speak? To this question Robert Krauss has,after a long research, the following surprising answer. The main purpose of hand gestures is not to communicate but to facilitate access to the mental lexicon.Krauss tells a story about this:
two friends walk together in a icy cold day. One of the two speaks and speaks moving the hands;the other remains silent with his hands kept in the pockets.
“Why are you so silent today?” asks him the always talking friend.”I forgot to take the gloves with me”, answers the silent one.

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