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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

Performance on the RT task. A, The fraction of trials in which subjects reported a sequence of tone bursts was increasing in frequency as a function of signed coherence and IBI. Positive coherence values indicate that the sequence was increasing in frequency; negative indicates decreasing. B, The mean RT (i.e., the time between sequence onset and button press) as a function of signed coherence and IBI on correct trials only (and all 0% coherence trials). C, As in B, but using signal RT (i.e., RT not including cumulative IBI). The solid curves are simultaneous fits of psychometric and chronometric data to a DDM (see Results). The psychometric data (A) only show the fit to the signal-RT data (C). In each panel, the points indicate performance data that was pooled across subjects. Colors represent different IBIs, as indicated in A.
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Figure 4: Performance on the RT task. A, The fraction of trials in which subjects reported a sequence of tone bursts was increasing in frequency as a function of signed coherence and IBI. Positive coherence values indicate that the sequence was increasing in frequency; negative indicates decreasing. B, The mean RT (i.e., the time between sequence onset and button press) as a function of signed coherence and IBI on correct trials only (and all 0% coherence trials). C, As in B, but using signal RT (i.e., RT not including cumulative IBI). The solid curves are simultaneous fits of psychometric and chronometric data to a DDM (see Results). The psychometric data (A) only show the fit to the signal-RT data (C). In each panel, the points indicate performance data that was pooled across subjects. Colors represent different IBIs, as indicated in A.

Mentions: Both accuracy and RT depended systematically on coherence and IBI. Figure 4 summarizes the behavioral performance of all six subjects. Choices tended to be more accurate and faster when stimulus coherence was high than when it was low.


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

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

Performance on the RT task. A, The fraction of trials in which subjects reported a sequence of tone bursts was increasing in frequency as a function of signed coherence and IBI. Positive coherence values indicate that the sequence was increasing in frequency; negative indicates decreasing. B, The mean RT (i.e., the time between sequence onset and button press) as a function of signed coherence and IBI on correct trials only (and all 0% coherence trials). C, As in B, but using signal RT (i.e., RT not including cumulative IBI). The solid curves are simultaneous fits of psychometric and chronometric data to a DDM (see Results). The psychometric data (A) only show the fit to the signal-RT data (C). In each panel, the points indicate performance data that was pooled across subjects. Colors represent different IBIs, as indicated in A.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: Performance on the RT task. A, The fraction of trials in which subjects reported a sequence of tone bursts was increasing in frequency as a function of signed coherence and IBI. Positive coherence values indicate that the sequence was increasing in frequency; negative indicates decreasing. B, The mean RT (i.e., the time between sequence onset and button press) as a function of signed coherence and IBI on correct trials only (and all 0% coherence trials). C, As in B, but using signal RT (i.e., RT not including cumulative IBI). The solid curves are simultaneous fits of psychometric and chronometric data to a DDM (see Results). The psychometric data (A) only show the fit to the signal-RT data (C). In each panel, the points indicate performance data that was pooled across subjects. Colors represent different IBIs, as indicated in A.
Mentions: Both accuracy and RT depended systematically on coherence and IBI. Figure 4 summarizes the behavioral performance of all six subjects. Choices tended to be more accurate and faster when stimulus coherence was high than when it was low.

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