Högskolan i Skövde

his.sePublikasjoner
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • apa-cv
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Separating Post-perceptual Processes From Auditory Awareness: An Electrophysiological Study With a No-response Task
Högskolan i Skövde, Institutionen för biovetenskap.
2019 (engelsk)Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
Abstract [en]

Two theories of consciousness have different ideas about when consciousness happens and what neural processes enable conscious experience. The recurrent processing theory supports an early onset of consciousness caused by recurring loops of information between sensory areas. Contrary to this belief, the global workspace theory claims that consciousness appears later, through global recurrent loops of information between sensory and higher order brain areas such as the visual cortex and frontoparietal areas. Electrophysiological studies have found an event-related negativity arising in primary visual areas around 200 ms that correlates to awareness. This activity suits the predictions of an early onset of consciousness made by the recurrent processing theory. It is followed by a later positive amplitude appearing around 400 ms. This activity is in line with predictions made by the global workspace theory. The current study transition from visual to auditory awareness research in order to find the neural correlates of consciousness in audition. A sound detection task with tones calibrated to each participants threshold value was used in the experiment and two electrophysiological measurements of auditory awareness were found. An auditory awareness negativity that appears around 200 ms after stimulus onset and a late positivity appearing around 400 ms. Researchers disagree about if these event-related potentials correlate with awareness or unrelated cognitive mechanisms. In order to solve this problem, the current experiment was devised to test if they were affected by response conditions. A no-response paradigm with reversed response conditions was used to separate pre- and post-conscious mechanisms from the auditory awareness negativity and the late positivity. Results showed that auditory awareness negativity was independent of response condition and thus free from post-perceptual processes. The late positivity amplitude seems to be dependent on response condition but the result was inconclusive.

sted, utgiver, år, opplag, sider
2019. , s. 40
Emneord [en]
auditory awareness negativity, late positivity, event-related potentials, recurrent processing theory, global workspace theory, neural correlates of consciousness
HSV kategori
Identifikatorer
URN: urn:nbn:se:his:diva-17784OAI: oai:DiVA.org:his-17784DiVA, id: diva2:1360108
Eksternt samarbeid
Gösta Ekmans Laboratorium
Fag / kurs
Cognitive Neuroscience
Utdanningsprogram
Consciousness Studies - Philosophy and Neuropsychology
Veileder
Examiner
Tilgjengelig fra: 2019-10-16 Laget: 2019-10-11 Sist oppdatert: 2019-10-16bibliografisk kontrollert

Open Access i DiVA

fulltext(650 kB)281 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 650 kBChecksum SHA-512
1ef7e89367b16f879e07872f2fffb3672ba6437dd5a54ba42f023739d253209cc8217cc6b5708331c070310af8ea115a13f3b61d37a71c25903bf054be046903
Type fulltextMimetype application/pdf

Søk i DiVA

Av forfatter/redaktør
Fjordstig, Andréas
Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 281 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 1410 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • apa-cv
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf