Parallel perceptual enhancement and hierarchic relevance evaluation in an audio-visual conjunction task.

Brain Research
Geoffrey F PottsLaura E Martin

Abstract

Attention directs limited-capacity information processing resources to a subset of available perceptual representations. The mechanisms by which attention selects task-relevant representations for preferential processing are not fully known. Triesman and Gelade's [Triesman, A., Gelade, G., 1980. A feature integration theory of attention. Cognit. Psychol. 12, 97-136.] influential attention model posits that simple features are processed preattentively, in parallel, but that attention is required to serially conjoin multiple features into an object representation. Event-related potentials have provided evidence for this model showing parallel processing of perceptual features in the posterior Selection Negativity (SN) and serial, hierarchic processing of feature conjunctions in the Frontal Selection Positivity (FSP). Most prior studies have been done on conjunctions within one sensory modality while many real-world objects have multimodal features. It is not known if the same neural systems of posterior parallel processing of simple features and frontal serial processing of feature conjunctions seen within a sensory modality also operate on conjunctions between modalities. The current study used ERPs and simultaneously presented ...Continue Reading

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Citations

May 11, 2017·Frontiers in Human Neuroscience·Laura Jiménez-OrtegaManuel Martín-Loeches
Jun 29, 2021·Frontiers in Human Neuroscience·Laura Jiménez-OrtegaManuel Martín-Loeches

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