“…Culturally familiar gestures raised ratings in two of the four evaluationsconfidence and communicative effectiveness-in Experiment 1, and in addition, they positively affected all of the evaluations in Experiment 2, including the lower judgments of nervousness and higher estimates of how long learners had been studying Japanese. The findings that familiar gestures positively influenced speech perception is consistent with literature showing that semantically related speech and gesture improve accuracy of L1 comprehension (Popelka and Berger, 1971;Graham and Argyle, 1975;Kelly et al, 2010;Dahl and Ludvigsen, 2014) and vocabulary retention in L2 learning (Allen, 1995;Sueyoshi and Hardison, 2005;Sime, 2006;Kelly et al, 2009;Morett, 2014), in addition to boosting speech perception when auditory information is moderately degraded (Obermeier et al, 2011;Drijvers and Özyürek, 2017). Adding to this work, the present study demonstrates that the cultural relationship between L2 speech and gesture matters, too.…”