1/2/2023 0 Comments Matlab 2008 psychportaudio![]() Other studies have examined the effect of contextual information on the perception of empty intervals and have shown that duration perception measured in a two interval discrimination task was distorted when an interval of short duration preceded the interval to be discriminated, compared to a condition in which a similar distractor was not present ( Karmarkar and Buonomano, 2007 Spencer et al., 2009 Burr et al., 2013). ![]() Interestingly, such distortions are not observed when non-temporal properties of the fillers (e.g., the sounds’ amplitudes, or frequencies) are made irregular ( Horr and Di Luca, 2015). Moreover, intervals interspersed with regularly spaced fillers are perceived as longer than intervals with irregularly spaced fillers ( Thomas and Brown, 1974). For example, empty intervals delimited by a marker at the beginning and the end are perceived to last longer than both filled intervals, in which the signal to be judged is continuous, and intervals filled by multiple regularly spaced markers ( Buffardi, 1971 Thomas and Brown, 1974 Adams, 1977 Rammsayer and Lima, 1991 Rammsayer and Leutner, 1996). It is influenced by auditory context - the presence of irrelevant sounds preceding, overlapping with, or succeeding the target sounds ( Large and Jones, 1999 Barnes and Jones, 2000). Duration perception, however, is not always veridical or reliable. The ability to perceive the duration of events in the range of milliseconds to seconds is thought to be fundamental to a number of cognitive abilities, including moving under temporal constraints, speech comprehension, music perception, and music production ( Buhusi and Meck, 2005). This effect of the regular context, however, was not selective for the duration of the first interval to be estimated, contrary to suggestions based on previous evidence. Duration perception was more precise when the intervals to be discriminated were preceded by a regular compared to a non-regular context. The influence of a regular compared to a non-regular auditory context on interval discrimination was examined with a two interval forced choice task, which required participants to discriminate between the durations of two time intervals. The present study reconsiders the effect of context regularity, focusing on the relationships among the intervals in the context and the interval to be estimated. ![]() These results have been explained in terms of attention and anticipation. ![]() Previous research has shown that a regular context made of evenly spaced sounds improves participants’ discrimination of intervals close in duration to the context intervals. In the auditory domain, the perceived duration of time intervals is influenced by background sounds – the auditory context in which the intervals are embedded – even when the background may be ignored. ![]()
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