Figure 1.

Experimental design (A) Depiction of a duration discrimination trial, presented either visually or aurally for shorter (2 s) or longer (12 s) durations. Trials were blocked by condition and lasted for target duration (2 or 12 s respectively) or 10% longer. To begin each trial participants had to press a key. After stimulus offset participants had to indicate via button press whether target or non-target duration was presented in a 2AFC manner. (B) Predictions for common neural mechanisms across different modalities (orange arrow for shorter duration, red for longer duration) or for different durations (green for auditory, blue for visual) based on correlation strengths of the variability in time estimation.