• accuracy
• auditory entrainment
• behavioral oscillations
• just noticeable difference
• neural oscillations
• psychometric functions
• response bias
• temporal order judgment
• visual time perception

Neural oscillations are almost ubiquitous in the brain and, besides affecting the way we perceive and respond to stimuli, they are thought to play a fundamental role in time perception.
In this psychophysical study, I used visual temporal order judgments to assess whether entrainment to periodical auditory stimuli affects visual time perception. Psychometric functions for temporal order were estimated to measure how the entrainment frequency (5, 10, 15, 20, 25 Hz) changes perceptual sensitivity, finding higher thresholds with entrainment in the alpha band (10 Hz). In addition, oscillations in both accuracy and response bias as a function of entrainment frequency (5 and 15 Hz) were analyzed by applying general linear model analysis and fitting sinusoidal functions on the time series of responses collected at different intervals (100-700 ms) following the entraining sound. The frequency of fluctuation of the participants’ performance was affected by the entrainment, but no apparent functional relation was found between entrainment frequency and behavioral oscillations.