Page 53 - It' about time: Studying the Encoding of Duration

Chapter 3 indicates that the current data were 205.34 times more likely to occur under the alternative hypothesis that attention modulated the DAE then under the null hypothesis that no attentional modulation occurred. 700 600 500 400 300 200 100 0 BF10 = 205.13 A200 A800 Figure 2. Average Point of Subjective Equality (PSE) for the cross-modal duration judgments following adaptation. Larger PSE values reflect shorter perceived duration for the test stimuli. Error bars reflect within-subject standard error (Cousineau, 2005; Morey, 2008). Bayes factors were used to describe the evidence for the alternative hypothesis that attention modulates the DAE. BF10 > 3.0 are considered evidence for the Ha (Jeffreys, 1998; Lee & Wagenmakers, 2013). This result demonstrates that attention allows for the selective encoding of duration information. This finding that attention modulates the DAE is in line with effects of attentional selection on adaptation for non-temporal feature information (Alais & Blake, 1999; Lankheet & Verstraten, 1995; Rhodes et al., 2011; Suzuki, 2001). Interestingly, the magnitude of attentional modulation is similar in magnitude to the after-effects obtained by studies using adaptation to only a single stream of durations (Maarseveen et al., 2017). This suggests that the modulatory strength of attention is relatively large and that unattended durations might not contribute to the measured DAE. In other words, the magnitude of attentional modulation found here could reflect an absence of the encoding of the unattended durations. This possibility was evaluated in Experiment 2. 52 PSE (ms)