Examples of stimuli used in Experiment 1.

<p>During habituation infants are presented with either increasing or decreasing numerical sequences (e.g., 9-18-36 or 36-18-9), and at test all infants are shown both increasing and decreasing new numerical sequences (e.g., 4-8-16 and 16-8-4). All sequences in both habituation and test are presented from left to right.