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What’s the meaning of this? A behavioral and neurophysiological investigation into the principles behind the classification of visual emotional stimuli
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SYSNO ASEP 0462136 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title What’s the meaning of this? A behavioral and neurophysiological investigation into the principles behind the classification of visual emotional stimuli Author(s) Czekóová, K. (CZ)
Shaw, D. J. (CZ)
Urbánek, Tomáš (PSU-E) RID, ORCID, SAI
Chládek, Jan (UPT-D) RID, ORCID, SAI
Lamoš, M. (CZ)
Roman, R. (CZ)
Brázdil, M. (CZ)Source Title Psychophysiology. - : Wiley - ISSN 0048-5772
Roč. 53, č. 8 (2016), s. 1203-1216Number of pages 14 s. Publication form Print - P Language eng - English Country US - United States Keywords Emotion ; Semantic content ; Categorization ; Intracerebral EEG ; Cluster analysis Subject RIV AN - Psychology Subject RIV - cooperation Institute of Scientific Instruments - Optics, Masers, Lasers R&D Projects GAP103/11/0933 GA ČR - Czech Science Foundation (CSF) LO1212 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support PSU-E - RVO:68081740 ; UPT-D - RVO:68081731 UT WOS 000382721300009 EID SCOPUS 84978674858 DOI 10.1111/psyp.12662 Annotation Two experiments were performed to investigate the principles by which emotional stimuli are classified on the dimensions of valence and arousal. In Experiment 1, a large sample of healthy participants rated emotional stimuli according to both broad dimensions. Hierarchical cluster analyses performed on these ratings revealed that stimuli were clustered according to their semantic content at the beginning of the agglomerative process. Example semantic themes include food, violence, nudes, death, and objects. Importantly, this pattern occurred in a parallel fashion for ratings on both dimensions. In Experiment 2, we investigated if the same semantic clusters were differentiated at the neurophysiological level. Intracerebral EEG was recorded from 18 patients with intractable epilepsy who viewed the same set of stimuli. Not only did electrocortical responses differentiate between these data-defined semantic clusters, they converged with the behavioral measurements to highlight the importance of categories associated with survival and reproduction. These findings provide strong evidence that the semantic content of affective material influences their classification along the broad dimensions of valence and arousal, and this principle of categorization exerts an effect on the evoked emotional response. Future studies should consider data-driven techniques rather than normative ratings to identify more specific, semantically related emotional images. Workplace Institute of Psychology Contact Štěpánka Halamová, Halamova@praha.psu.cas.cz, Tel.: 222 222 096 Year of Publishing 2017 Electronic address https://onlinelibrary.wiley.com/doi/epdf/10.1111/psyp.12662
Number of the records: 1