Figure 1.

The four types of test trials with novel and familiar objects visible in the light or hidden in the dark. Trials in the dark are depicted using shaed images but were completely dark from the infant’s perspective, with the exception of the two glow-in-the-dark strips of tape flanking the search space. The semi-circular search space depicted on the table was not visible to infants but was instead marked on the observer’s video monitor for coding purposes. To equate for attractiveness, the object designated ‘familiar’ was counterbalanced across participants. The familiar object was the same across all familiar trials, whereas each novel trial introduced a unique novel object.