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Vpliv emocionalnih dražljajev na P300 pri nalogi detekcije redkih dražljajev : magistrsko deloTomat, NastjaČustveni dražljaji so tako pomembni za optimalno delovanje v okolju, da avtomatsko izzovejo povišano pozornost, kar omogoča prednost pri nadaljnjem procesiranju in ustrezen vedenjski odziv. Vpliv ... čustev na pozornost lahko preučujemo s pomočjo elektroencefalografije (EEG), specifično z uporabo z dogodkom povezanih potencialov. Val P300 je pozitivni potencial z največjo amplitudo na sredini skalpa, ki se pojavi okrog 300 ms po prikazu dražljaja pri nalogi prepoznavanja redkih dražljajev. Odraža procese kategorizacije in primerjave novega dražljaja s starim ter posodabljanje mentalne reprezentacije v delovnem spominu. Namen raziskave je bil preučiti, kako na val P300 vplivajo čustvena vsebina dražljaja (negativni ali nevtralni), tip dražljaja (tarča ali motilec) in vsebina kategorizacije (glede na čustveno vsebino ali prisotnost ljudi). 32 udeležencev je med beleženjem EEG-signala izvajalo nalogo vidnega prepoznavanja redkih dražljajev s štirimi pogoji: prepoznavanje negativnih dražljajev, nevtralnih dražljajev, dražljajev z ljudmi in dražljajev brez ljudi. V vseh pogojih smo zabeležili P300 z največjo amplitudo parietalno 500 ms po prikazu dražljaja in pozni pozitivni potencial, ki je vztrajal do 1000 ms po dražljaju ali dlje. Negativni dražljaji so tako v vlogi tarč kot motilcev vzbudili večjo amplitudo P300 in poznega pozitivnega potenciala od nevtralnih v časovnem intervalu med 370 in 1200 ms po dražljaju. Vsebina kategorizacije ni vplivala na amplitudo P300 in poznega pozitivnega potenciala, prav tako ne tip dražljaja. Zaključili smo, da čustveni dražljaji zaradi svoje intrinzične motivacijske relevantnosti pritegnejo dodatne pozornostne vire ne glede na to, ali so relevantni za nalogo in ali smo nanje načrtno pozorni.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [N. Tomat], 2019Language - slovenianCOBISS.SI-ID - 70314594
Author
Tomat, Nastja
Other authors
Repovš, Grega
Topics
pozornost |
čustva |
elektroencefalografija EEG |
z dogodkom povezani potenciali |
P300 |
magistrska dela |
attention |
emotions |
electroencephalography EEG |
event related potential |
P300 |
masters theses
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Library/institution |
City | Acronym | For loan | Other holdings |
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Faculty of Arts, Central Humanities Library, Lj. | Ljubljana | FFLJ |
reading room 1 cop.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Tomat, Nastja | ![]() |
Repovš, Grega | 17893 |
Source: Personal bibliographies
and: SICRIS
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