Trial structure and results of Experiment 1.

<p>Panel A shows the events on each trial, which began with a blank screen for 1000 ms. Participants judged whether the second image was shown for more or less time than the first. On repeat trials, the images were identical; on novel trials the images were different. Panel B shows the results. The point of subjective equality (PSE) was greater for repeated stimuli, indicating shorter subjective duration; repetition produced no discernible effect on the difference limen (DL), a measure of temporal discrimination. Error bars show plus/minus one SEM, calculated separately for each data point. Note that for a within-subject design such as this, these error bars provide no indication of the significance of differences between conditions <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0019815#pone.0019815-Loftus1" target="_blank">[51]</a>.