Past research has suggested that those spontaneous movements of the human hand made during talk convey significant semantic information over and above the speech, at least when the unit of speech analyzed is the individual clause. However, no previous research has tested whether this information is represented linguistically elsewhere in the narrative . The first study, reported here, uses an experimental procedure to identify which specific imagistic gestures add semantic information to the speech. The second study analyzes whether the specific (...) gestures still do this when respondents hear the whole narrative. It was found that two thirds of the semantic information, thought to be carried by the gestures, is, in fact, represented in the linguistic discourse, or is inferable from it. However, one third of the additional semantic information contained in the gestures is not represented linguistically in the narrative nor is it inferable from it. In other words, a proportion of the imagistic gestures that accompany speech are absolutely critical to semantic communication. (shrink)

Speakers frequently produce elaborate hand movements during talk that have been shown to serve a communicative function. Nevertheless, two-thirds of the semantic content of these hand movements is encoded linguistically elsewhere in the discourse . The present experiment demonstrated that while 62.9% of semantic information in gesture was elsewhere, most gestures retained at least one semantic feature that was never represented linguistically. Semantic features were more explicit when they occurred in gesture than when represented linguistically. Even in cases where the (...) imagistic gesture appeared somewhat redundant, gesture at the narrative level preserves a discernable communicative function. (shrink)