A subeffect test showed significant simple main effect of language in Grounding act "init" (F(1, 99) = 4.53, p < .05), "ack-init" (F(1, 99) = 8.91, p < .01) "cont" (F(1, 99) = 50.84, p < .001).
three sets of NAC EMR-9 head-mounted eye trackers and headsets with microphones recorded their eye gazes and voices.