Selective attention to multidimensional auditory stimuli.

Abstract

Event-related brain potentials (ERPs) elicited by multidimensional auditory stimuli were recorded from the scalp in a selective-attention task. Subjects listened to tone pips varying orthogonally between two levels each of pitch, location, and duration and responded to longer duration target stimuli having specific values of pitch and location. The discriminability of the pitch and location attributes was varied between groups. By examining the ERPs to tones that shared pitch and/or locational cues with the designated target, we inferred interrelationships among the processing of these attributes. In all groups, stimuli that failed to match the target tone in an easily discriminable cue elicited only transitory ERP signs of selective processing. Tones sharing the "easy" but not the "hard" cue with the target elicited ERPs that indicated more extensive processing, but not as extensive as stimuli sharing both cues. In addition, reaction times and ERP latencies to the designated targets were not influenced by variations in the discriminability of pitch and location. This pattern of results is consistent with parallel, self-terminating models and holistic models of processing and contradicts models specifying either serial or exhaustive parallel processing of these dimensions. Both the parallel, self-terminating models and the holistic models provide a generalized mechanism for hierarchical stimulus selections that achieve an economy of processing, an underlying goal of classic, multiple-stage theories of selective attention.

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   Näätänen, R., Paavilainen, P., Rinne, T., Alho, K. · 2007 · Clinical Neurophysiology
3. On the utility of P3 amplitude as a measure of processing capacity
   Kok, Albert · 2001 · Psychophysiology
4. Processing negativity: An evoked-potential reflection.
   Näätänen, Risto · 1982 · Psychological Bulletin
5. Selective attention to color and location: An analysis with event-related brain potentials
   Hillyard, Steven A., Münte, Thomas F. · 1984 · Perception & Psychophysics

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