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To date, within the context of second language (L2) word learning, nonspontaneous representational gesture viewing's impact on memory and spontaneous gesture production's impact on communication have been examined separately. Thus, it is unclear whether and how these effects interact, particularly in the same individuals. The present study addresses this question by comparing these effects and by examining their influence on one another. To do so, a dialogic task was employed in which participants learned words from a novel L2 and taught them to other similar participants. The results show that viewing nonspontaneous representational gesture did not affect L2 word recall whereas spontaneous production of different gesture types affected communication and memory of L2 word meanings in varying ways. Furthermore, the results provide evidence that gesture viewing primes production of similar types of gestures, and that the quantity and types of gestures produced differ based on the context of communication. These results indicate that the effects of spontaneous gesture production on communication are stronger than the effects of nonspontaneous gesture viewing on memory, and that these effects influence one another. Together, these results demonstrate that spontaneous gesture production and nonspontaneous gesture viewing play distinct but interrelated roles in L2 acquisition.
