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Temporal Integration of Auditory Information Is Invariant to Temporal Grouping Cues(1,2,3).

Liu AS, Tsunada J, Gold JI, Cohen YE - eNeuro (2015)

Bottom Line: Auditory perception depends on the temporal structure of incoming acoustic stimuli.We designed a novel discrimination task that required human listeners to decide whether a sequence of tone bursts was increasing or decreasing in frequency.We manipulated temporal perceptual-grouping cues by changing the time interval between the tone bursts, which led to listeners hearing the sequences as a single sound for short intervals or discrete sounds for longer intervals.

View Article: PubMed Central - HTML - PubMed

Affiliation: Bioengineering Graduate Group.

ABSTRACT
Auditory perception depends on the temporal structure of incoming acoustic stimuli. Here, we examined whether a temporal manipulation that affects the perceptual grouping also affects the time dependence of decisions regarding those stimuli. We designed a novel discrimination task that required human listeners to decide whether a sequence of tone bursts was increasing or decreasing in frequency. We manipulated temporal perceptual-grouping cues by changing the time interval between the tone bursts, which led to listeners hearing the sequences as a single sound for short intervals or discrete sounds for longer intervals. Despite these strong perceptual differences, this manipulation did not affect the efficiency of how auditory information was integrated over time to form a decision. Instead, the grouping manipulation affected subjects' speed-accuracy trade-offs. These results indicate that the temporal dynamics of evidence accumulation for auditory perceptual decisions can be invariant to manipulations that affect the perceptual grouping of the evidence.

No MeSH data available.


Related in: MedlinePlus

Influence of IBI on reports of perceived grouping. Subjects reported whether they perceived the stimulus as one sound or discrete sounds. The graph shows proportion of trials in which each subject chose one sound as a function of IBI. The points indicate each subject’s performance. Each curve represents a logistic function that was fit to each subject’s reports across four sessions. The gray line indicates 50% of trials reported as “one sound”, which was IBI threshold. Colors represent different subjects.
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Figure 3: Influence of IBI on reports of perceived grouping. Subjects reported whether they perceived the stimulus as one sound or discrete sounds. The graph shows proportion of trials in which each subject chose one sound as a function of IBI. The points indicate each subject’s performance. Each curve represents a logistic function that was fit to each subject’s reports across four sessions. The gray line indicates 50% of trials reported as “one sound”, which was IBI threshold. Colors represent different subjects.

Mentions: The temporal manipulation was a change in the IBI of the stimulus sequence, which affected perceptual grouping. For short IBIs (<∼30 ms), subjects tended to report that the sequence was one sound. For medium IBIs (∼30-100 ms), subjects alternated trial-by-trial between reports that the sequence was one sound or a series of discrete sounds. For long IBIs (>∼100 ms), subjects reliably reported that the sequence was a series of discrete sounds (Fig. 3). To test how this grouping manipulation affected the temporal dynamics of the perceptual decision (i.e., the frequency direction of the tone-burst sequence), we used three versions of a discrimination task: an RT task in which subjects controlled listening duration; a variable-duration task in which the experimenter controlled listening duration; and a hybrid task that combined the variable-duration task with an explicit grouping judgment about whether the sound was one sound or a series of discrete sounds. Results from each task are presented below.


Temporal Integration of Auditory Information Is Invariant to Temporal Grouping Cues(1,2,3).

Liu AS, Tsunada J, Gold JI, Cohen YE - eNeuro (2015)

Influence of IBI on reports of perceived grouping. Subjects reported whether they perceived the stimulus as one sound or discrete sounds. The graph shows proportion of trials in which each subject chose one sound as a function of IBI. The points indicate each subject’s performance. Each curve represents a logistic function that was fit to each subject’s reports across four sessions. The gray line indicates 50% of trials reported as “one sound”, which was IBI threshold. Colors represent different subjects.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4596088&req=5

Figure 3: Influence of IBI on reports of perceived grouping. Subjects reported whether they perceived the stimulus as one sound or discrete sounds. The graph shows proportion of trials in which each subject chose one sound as a function of IBI. The points indicate each subject’s performance. Each curve represents a logistic function that was fit to each subject’s reports across four sessions. The gray line indicates 50% of trials reported as “one sound”, which was IBI threshold. Colors represent different subjects.
Mentions: The temporal manipulation was a change in the IBI of the stimulus sequence, which affected perceptual grouping. For short IBIs (<∼30 ms), subjects tended to report that the sequence was one sound. For medium IBIs (∼30-100 ms), subjects alternated trial-by-trial between reports that the sequence was one sound or a series of discrete sounds. For long IBIs (>∼100 ms), subjects reliably reported that the sequence was a series of discrete sounds (Fig. 3). To test how this grouping manipulation affected the temporal dynamics of the perceptual decision (i.e., the frequency direction of the tone-burst sequence), we used three versions of a discrimination task: an RT task in which subjects controlled listening duration; a variable-duration task in which the experimenter controlled listening duration; and a hybrid task that combined the variable-duration task with an explicit grouping judgment about whether the sound was one sound or a series of discrete sounds. Results from each task are presented below.

Bottom Line: Auditory perception depends on the temporal structure of incoming acoustic stimuli.We designed a novel discrimination task that required human listeners to decide whether a sequence of tone bursts was increasing or decreasing in frequency.We manipulated temporal perceptual-grouping cues by changing the time interval between the tone bursts, which led to listeners hearing the sequences as a single sound for short intervals or discrete sounds for longer intervals.

View Article: PubMed Central - HTML - PubMed

Affiliation: Bioengineering Graduate Group.

ABSTRACT
Auditory perception depends on the temporal structure of incoming acoustic stimuli. Here, we examined whether a temporal manipulation that affects the perceptual grouping also affects the time dependence of decisions regarding those stimuli. We designed a novel discrimination task that required human listeners to decide whether a sequence of tone bursts was increasing or decreasing in frequency. We manipulated temporal perceptual-grouping cues by changing the time interval between the tone bursts, which led to listeners hearing the sequences as a single sound for short intervals or discrete sounds for longer intervals. Despite these strong perceptual differences, this manipulation did not affect the efficiency of how auditory information was integrated over time to form a decision. Instead, the grouping manipulation affected subjects' speed-accuracy trade-offs. These results indicate that the temporal dynamics of evidence accumulation for auditory perceptual decisions can be invariant to manipulations that affect the perceptual grouping of the evidence.

No MeSH data available.


Related in: MedlinePlus