Visual cues were deliberately jittered to prevent timing information leakage

Evidence

In experiment 1, click detection performance was assessed using a two-interval two-alternative forced-choice task (2I2AFC); see Fig. 1b . The click train was presented in a randomly selected interval, whereas the other interval contained only silence. Listeners judged which interval contained the clicks and received visual feedback. Visual stimulus timing was jittered to provide no valid cue of the click timing. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4777