Schwartze, Michael; Farrugia, Nicolas and Kotz, Sonja A.. 2013. Dissociation of formal and temporal predictability in early auditory evoked potentials. Neuropsychologia, 51(2), pp. 320-325. ISSN 0028-3932 [Article]

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Abstract or Description

Perceived regularity among events in the environment allows predictions regarding the “when” and the “what” dimensions of future events. In this context, one crucial question concerns the impact and the potentially optimizing effect, of regular temporal structure on the processing of “what”, or formal, information. The current study addresses this issue by investigating whether temporal and formal structure interact during early stages of sensory processing, and by relating the respective findings to the concept of a predictive bias in brain function. Analyses were performed on two components of the auditory event-related-potential of the electroencephalogram, namely the P50 and the N100. Oddball sequences consisting of frequent standard and infrequent deviant sinusoidal tones were presented with either regular or irregular temporal structure in pre-attentive and attentive experimental settings (Schwartze, Rothermich, Schmidt-Kassow, & Kotz, 2011). Temporal regularity effects on pre-attentive and attentive processing of deviance. Biological Psychology, 87, 146–151). The results confirm that the P50 and the N100 amplitudes reliably encode formal and temporal predictability. Similar patterns of results obtained with pre-attentive and attentive task instructions, as well as the absence of a significant interaction of formal and temporal structure suggest that the P50 response may be interpreted as an automatic marker of predictability, whereas the N100 may represent a more complex marker, in which formal and temporal structure start interacting as a function of attention.

Item Type:	Article
Identification Number (DOI):	https://doi.org/10.1016/j.neuropsychologia.2012.09.037
Additional Information:	The first author was supported by DFG KO 2268/6-1 granted to S. A. K.
Keywords:	ERP; Prediction; Attention; Suppression; Formal structure; Temporal structure
Departments, Centres and Research Units:	Psychology
Dates:	Date Event January 2013 Published
Item ID:	10611
Date Deposited:	09 Sep 2014 09:51
Last Modified:	09 Sep 2014 09:51
Peer Reviewed:	Yes, this version has been peer-reviewed.
URI:	https://research.gold.ac.uk/id/eprint/10611

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