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Preattentive representation of feature conjunctions for concurrent spatially distributed auditory objects.
Brain Res Cogn Brain Res. 2005 Sep; 25(1):169-79.BR

Abstract

The role of attention in conjoining features of an object has been a topic of much debate. Studies using the mismatch negativity (MMN), an index of detecting acoustic deviance, suggested that the conjunctions of auditory features are preattentively represented in the brain. These studies, however, used sequentially presented sounds and thus are not directly comparable with visual studies of feature integration. Therefore, the current study presented an array of spatially distributed sounds to determine whether the auditory features of concurrent sounds are correctly conjoined without focal attention directed to the sounds. Two types of sounds differing from each other in timbre and pitch were repeatedly presented together while subjects were engaged in a visual n-back working-memory task and ignored the sounds. Occasional reversals of the frequent pitch-timbre combinations elicited MMNs of a very similar amplitude and latency irrespective of the task load. This result suggested preattentive integration of auditory features. However, performance in a subsequent target-search task with the same stimuli indicated the occurrence of illusory conjunctions. The discrepancy between the results obtained with and without focal attention suggests that illusory conjunctions may occur during voluntary access to the preattentively encoded object representations.

Authors+Show Affiliations

Cognitive Brain Research Unit, Department of Psychology, University of Helsinki, Budapest, Hungary.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15953710

Citation

Takegata, Rika, et al. "Preattentive Representation of Feature Conjunctions for Concurrent Spatially Distributed Auditory Objects." Brain Research. Cognitive Brain Research, vol. 25, no. 1, 2005, pp. 169-79.
Takegata R, Brattico E, Tervaniemi M, et al. Preattentive representation of feature conjunctions for concurrent spatially distributed auditory objects. Brain Res Cogn Brain Res. 2005;25(1):169-79.
Takegata, R., Brattico, E., Tervaniemi, M., Varyagina, O., Näätänen, R., & Winkler, I. (2005). Preattentive representation of feature conjunctions for concurrent spatially distributed auditory objects. Brain Research. Cognitive Brain Research, 25(1), 169-79.
Takegata R, et al. Preattentive Representation of Feature Conjunctions for Concurrent Spatially Distributed Auditory Objects. Brain Res Cogn Brain Res. 2005;25(1):169-79. PubMed PMID: 15953710.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preattentive representation of feature conjunctions for concurrent spatially distributed auditory objects. AU - Takegata,Rika, AU - Brattico,Elvira, AU - Tervaniemi,Mari, AU - Varyagina,Olga, AU - Näätänen,Risto, AU - Winkler,István, PY - 2005/01/24/received PY - 2005/05/06/revised PY - 2005/05/06/accepted PY - 2005/6/15/pubmed PY - 2006/1/5/medline PY - 2005/6/15/entrez SP - 169 EP - 79 JF - Brain research. Cognitive brain research JO - Brain Res Cogn Brain Res VL - 25 IS - 1 N2 - The role of attention in conjoining features of an object has been a topic of much debate. Studies using the mismatch negativity (MMN), an index of detecting acoustic deviance, suggested that the conjunctions of auditory features are preattentively represented in the brain. These studies, however, used sequentially presented sounds and thus are not directly comparable with visual studies of feature integration. Therefore, the current study presented an array of spatially distributed sounds to determine whether the auditory features of concurrent sounds are correctly conjoined without focal attention directed to the sounds. Two types of sounds differing from each other in timbre and pitch were repeatedly presented together while subjects were engaged in a visual n-back working-memory task and ignored the sounds. Occasional reversals of the frequent pitch-timbre combinations elicited MMNs of a very similar amplitude and latency irrespective of the task load. This result suggested preattentive integration of auditory features. However, performance in a subsequent target-search task with the same stimuli indicated the occurrence of illusory conjunctions. The discrepancy between the results obtained with and without focal attention suggests that illusory conjunctions may occur during voluntary access to the preattentively encoded object representations. SN - 0926-6410 UR - https://www.unboundmedicine.com/medline/citation/15953710/Preattentive_representation_of_feature_conjunctions_for_concurrent_spatially_distributed_auditory_objects_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0926-6410(05)00156-4 DB - PRIME DP - Unbound Medicine ER -