Stimulusekvivalens og N400 komponentet, EEG-mål av relasjonsstyrke

Kategori
Eksperimentell
Format
Innlegg i symposium
Performers
Guro DunvollHøgskolen i Oslo og Akershus 
Thorbjørn ElvsåshagenHøgskolen i Oslo og Akershus(Krediteres)
Erik Arntzen (Krediteres)
Abstract
A better understanding of complex human behavior can be increased by neuroscientific measures such as electroencephalography (EEG) (Donahoe & Palmer, 1994; Moore, 1997; Ortu, 2012). The N400 event related potential (ERP) is one example of EEG-based measures of complex human behavior, that is an index of semantic processing. In a typical experiment, two stimuli are successively presented. When there is no relation between the two stimuli the N400 component is elicited, a negative peak 400 ms after the second stimulus is presented. The N400 is not elicited if a relation has been established between the stimuli. The N400 effect also applies when the stimuli are not directly trained as in the test for equivalence class formation (Bortoloti et al, 2014). The current presentation discusses a pilot project in healthy adult volunteers to investigate ERPs during a priming procedure after formed three 3-member classes with C-stimuli as familiar pictures. The main findings from this pilot support the results from Bortoloti et al. (2014), that unrelated stimuli elicit a larger N400 than stimuli pair in equivalence classes.