The production of pointing and other gestures (e.g. reaching or indicative gestures) by 47 infants aged 1;0 to 1;6 was investigated in two experiments contrasting declarative-referential vs. imperative-instrumental conditions of communication. A further group of seven infants aged 0;10 was examined in order to highlight pre-pointing transitional phenomena. Data analyses concerned gestures and associated vocalizations and visual checking with a social partner. Results show that gestures are produced differentially in the experimental conditions: while reaching is only produced in imperative-instrumental contexts, pointing is characteristic of declarative-referential contexts. The pattern of visual checking with the social partner also differentiates gestures; moreover, it shows developmental changes in the case of pointing. Results suggest that pointing relies on some awareness of 'psychological' processes (e.g. attention and sharing) in the other and the self, and that it is this which may account for the specific relevance of pointing for language development.
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