Temporal preparation contributes to the overestimation of duration of ‘oddball’ events
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1
Michigan State University, Department of Psychology, United States
Durations of deviant (“oddball”) stimuli embedded within series of identical (“standard”) stimuli tend to be overestimated, with the degree of overestimation larger in later serial positions. A repetition suppression account of the oddball effect, including the effect of position, proposes that oddball overestimation is an indirect result of habituation to the repeated standard. An alternative possibility is that, although the oddball is a deviant stimulus, individuals can temporally prepare for oddballs that are in later serial positions; thus, this makes the oddball effect potentially akin to a variable foreperiod (FP) effect. This study considered the contribution of temporal preparation to the oddball effect by (1) comparing perceived duration of auditory oddballs occurring after filled or unfilled variable FPs, (2) varying likelihood of oddball occurrence on each trial, and (3) investigating trial-to-trial effects. Participants either heard 9-tone sequences (filled FP condition), in which the oddball occurred in the 5th – 8th serial position or 2-tone sequences (unfilled FP condition), in which the timing of the oddball was matched to that of the 9-tone sequences, but all tones between the first standard and the oddball were removed. In both conditions, participants judged oddball duration relative to standard duration. If the oddball effect is due to repetition suppression, then later-occurring oddballs would be expected to be overestimated in the filled FP condition, but not in the unfilled FP condition. Results revealed longer perceived durations for later-occurring oddballs in both filled and unfilled FP conditions. As expected, this variable FP effect on perceived duration was weaker when oddballs did not occur on some trials. The lack of difference between filled and unfilled FP conditions suggests that the repetition suppression account is untenable. Rather, these results support the alternative view that temporal preparation contributes to systematic distortions in the perceived duration of oddball stimuli.
Keywords:
time perception and timing,
temporally selective attention,
temporal processing,
Attention,
deviance detection
Conference:
14th Rhythm Production and Perception Workshop Birmingham 11th - 13th September 2013, Birmingham, United Kingdom, 11 Sep - 13 Sep, 2013.
Presentation Type:
Poster Presentation
Topic:
Rhythm Production and Perception
Citation:
Fromboluti
E,
Jones
KB and
McAuley
J
(2013). Temporal preparation contributes to the overestimation of duration of ‘oddball’ events.
Conference Abstract:
14th Rhythm Production and Perception Workshop Birmingham 11th - 13th September 2013.
doi: 10.3389/conf.fnhum.2013.214.00013
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Received:
19 Jul 2013;
Published Online:
24 Sep 2013.
*
Correspondence:
Mrs. Elisa Kim Fromboluti, Michigan State University, Department of Psychology, East Lansing, MI, 48824, United States, kimelis1@msu.edu
Dr. J. Devin McAuley, Michigan State University, Department of Psychology, East Lansing, MI, 48824, United States, dmcauley.msu@gmail.com