Subjective duration (i.e. difference from the 2 s standard stimulus) estimated by the Quest algorithm for each stimulation frequency (mean of all 30 participants).

One-tailed paired-samples t-tests (corrected for multiple comparisons with the Bonferroni-Holm method) indicate that for frequencies up to 41.7 Hz the estimated duration significantly differed from the duration estimated for the reference frequency; stimuli flickering at these frequencies were perceived as longer. The last column shows Bayes factors, corresponding to the ratio between the probabilities of the null and alternative hypotheses. Bayes factors <0.3 can be taken as evidence for an effect of flicker frequency on perceived duration, while Bayes factors ≥3 indicate that there is likely no such effect. Intermediate values allow no conclusive decision for either of the two hypotheses.