THE EFFECT OF STIMULUS NOVELTY ON SUBSEQUENT INFORMATION PROCESSING: AN ERP STUDY
Abstract
The present experiment was carried out in order to determine the effect of presided familiar or unfamiliar stimuli (primes) presentation on the visual information processing (target stimuli). We recorded event-related potentials (ERPs) in response to images of everyday objects (dog, hat, etc.) while participants performed classification task (animate or inanimate object). All these images were primed by two groups of unrelated primes: 1) images memorized by participants earlier (familiar primes), and 2) images, presented for the first time during experiment (unfamiliar primes). Targets were presented for 400
ms, primes — for 325 ms, with no interval between them. Results of the experiment showed decrease of N400 amplitudes for targets primed by unfamiliar images as compared to targets primed by familiar images. It is proposed that decrease of N400 amplitudes is connected with improvement of stimuliprocessing efficiency in identifi cation tasks (Gotts et al., 2012). We interpret obtained results through inhibitory impact of familiar stimuli on non-related memory traces. Refs 23. Figs 3.
Keywords:
stimuli novelty, priming, event related potentials, N400
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Articles of "Vestnik of Saint Petersburg University. Sociology" are open access distributed under the terms of the License Agreement with Saint Petersburg State University, which permits to the authors unrestricted distribution and self-archiving free of charge.