Figure 3.

Illustration of the stimulus sequence in Experiment 1. Participants had to report the target digit inside a square. The target digit was embedded among streams of both letters and digits distractors such that only the square (and not its alphanumeric category) could be used to identify the target. The target appeared at positions 5 to 8 within a single (A) or two (B) streams. The pre-target frame and post-target frames contained only letters (baseline condition; A–B) on 20% of the trials. On the rest of the trials, either the pre-target frame or the post-target frame contained a digit at the same location as the target (C–D).