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Design of one example trial (from a total of 4). The visual stimuli were recordings of live actors in conversation and live actors acting on other actors or on objects. The auditory stimuli were recordings of a female native English speaker speaking in child-directed speech. The materials were presented on a 24-inch widescreen eye-tracker monitor (Tobii T60XL; Studio 2.0), which recorded the coordinates of children’s gaze at a rate of 60 frames/sec.
