Fig. 1.

Change detection task. Sequence of events during a trial. Each trial began with an auditory prompt saying, “Let’s look for color changes!” along with a fixation circle on the left or right side of the screen that preceded where the target stimuli appeared. The experimenter initiated the trial when the child was ready. The sample array then appeared on the screen for 2 s, followed by a blank interval of 1 s. The test array was then presented until the child verbally responded “same” or “different.” The experimenter entered the child’s response on a keyboard.