Gutenberg Open Science: Why do forward maskers affect auditory intensity discrimination? : Evidence from "molecular psychophysics"

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-7963

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DC Field	Value	Language
dc.contributor.author	Oberfeld-Twistel, Daniel	-
dc.contributor.author	Stahn, Patricia	-
dc.contributor.author	Kuta, Martha	-
dc.date.accessioned	2022-10-13T07:10:34Z	-
dc.date.available	2022-10-13T07:10:34Z	-
dc.date.issued	2014
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/7978	-
dc.description.abstract	Nonsimultaneous maskers can strongly impair performance in an auditory intensity discrimination task. Using methods of molecular psychophysics, we quantified the extent to which (1) a masker-induced impairment of the representation of target intensity (i.e., increase in internal noise) and (2) a systematic influence of the masker intensities on the decision variable contribute to these effects. In a two-interval intensity discrimination procedure, targets were presented in quiet, and combined with forward maskers. The lateralization of the maskers relative to the targets was varied via the interaural time difference. Intensity difference limens (DLs) were strongly elevated under forward masking but less with contralateral than with ipsilateral maskers. For most listeners and conditions, perceptual weights measuring the relation between the target and masker levels and the response in the intensity discrimination task were positive and significant. Higher perceptual weights assigned to the maskers corresponded to stronger elevations of the intensity DL. The maskers caused only a weak increase in internal noise, unrelated to target level and masker lateralization. The results indicate that the effects of forward masking on intensity discrimination are determined by an inclusion of the masker intensities in the decision variable, compatible with the hypothesis that the impairment in performance is to a large part caused by difficulties in directing selective attention to the targets. The effects of masker lateralization are evidence for top-down influences, and the observed positive signs of the masker weights suggest that the relevant mechanisms are located at higher processing stages rather than in the auditory periphery.	en_GB
dc.description.sponsorship	DFG, Open Access-Publizieren Universität Mainz / Universitätsmedizin	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	150 Psychologie	de_DE
dc.subject.ddc	150 Psychology	en_GB
dc.title	Why do forward maskers affect auditory intensity discrimination? : Evidence from "molecular psychophysics"	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-7963	-
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 02 Sozialwiss., Medien u. Sport	de
jgu.organisation.number	7910	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	PLoS one	de
jgu.journal.volume	9	de
jgu.journal.issue	6	de
jgu.pages.alternative	e99745	de
jgu.publisher.year	2014	-
jgu.publisher.name	PLoS	de
jgu.publisher.place	Lawrence, Kan.	de
jgu.publisher.uri	http://dx.doi.org/10.1371/journal.pone.0099745	de
jgu.publisher.issn	1932-6203	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	150	de
opus.date.modified	2018-08-09T07:25:13Z
opus.subject.dfgcode	02-110
opus.organisation.string	FB 02: Sozialwissenschaften, Medien und Sport: Psychologisches Institut	de_DE
opus.identifier.opusid	26207
opus.institute.number	0204
opus.metadataonly	false
opus.type.contenttype	Keine	de_DE
opus.type.contenttype	None	en_EN
opus.affiliated	Oberfeld-Twistel, Daniel
opus.affiliated	Kuta, Martha
jgu.publisher.doi	10.1371/journal.pone.0099745	de
jgu.organisation.ror	https://ror.org/023b0x485	-
Appears in collections:	DFG-OA-Publizieren (2012 - 2017)

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