Mean of Preference scores (%) toward the visual speech (Standard Deviation) across baseline and test trials in Experiment 1b; auditory-only familiarization lasted 20 seconds.

<p><i>Note: T</i>-tests to compare the Preference scores between the audio-matching visual speech across test trials to preferential looking across baseline trials and <i>t</i>-tests comparing preference scores across test trials to chance are also represented.