Event Abstract

Sequential processing and the matching-stimulus interval effect in ERP components: An exploration of the mechanism

  • 1 University of Wollongong, Australia
  • 2 University of Western Sydney, School of Social Sciences and Psychology, Australia

Aims: In oddball tasks, the stimulus-to-matching-stimulus interval refers to the time separating the presentation of identical stimuli, including the target-to-target interval (TTI), and the nontarget-to-nontarget interval (NNI). Both TTI and NNI have been shown to have a large effect on components of the ERP, with increases in these intervals systematically enhancing N1, P2, and P300 amplitudes. Method: This study examined the mechanism underpinning the stimulus-to-matching-stimulus interval effect in components of the ERP using a conventional three-tone oddball task. We took a novel approach and applied multiple regression to explore component changes due to “naturally” occurring intervals within the stimulus series, rather than constraining the task with artificially constructed intervals. Twenty eight young adults completed the three-tone oddball task whilst their EEG activity was recorded. Results: For targets, Mismatch Negativity (MMN) was predicted by N1 and TTI, TTI predicted P3a and P3b, and reaction time was predicted by Processing Negativity (PN), P3b, and TTI. Infrequent-nontarget P1 predicted N1, NNI predicted MMN, and N1 predicted Slow Wave (SW). In addition, target N1 and PN, and infrequent-nontarget P1, P3, and Novelty P3, and all frequent standard components (N1, P2, P196, SW) had determinants other than those examined. Conclusions: Findings show that the mechanism is operating on separate stages of stimulus processing, suggestive of either increased activation within a number of stimulus-specific pathways, or very long component generator recovery cycles.

Keywords: event-related potentials (ERPs), Target-to-target interval (TTI), Nontarget-to-nontarget interval (NNI), Sequence effects, Interstimulus interval (ISI), Probability, oddball paradigm, P300, P1, N1, P2, MMN (Mismatch negativity), P3a, P3b, Processing Negativity, Slow Wave

Conference: Australasian Society for Psychophysiology, Inc, Coffs Harbour, Australia, 26 Nov - 28 Nov, 2014.

Presentation Type: Oral Presentation

Topic: Psychophysiology

Citation: Steiner GZ, Barry RJ and Gonsalvez CJ (2014). Sequential processing and the matching-stimulus interval effect in ERP components: An exploration of the mechanism. Conference Abstract: Australasian Society for Psychophysiology, Inc. doi: 10.3389/conf.fnhum.2014.216.00031

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Received: 07 Oct 2014; Published Online: 02 Dec 2014.

* Correspondence: Ms. Genevieve Z Steiner, University of Wollongong, Wollongong, NSW, 2500, Australia, G.Steiner@westernsydney.edu.au

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