Annika AnderssonDoktorand
Om mig
Jag doktorerar inom psykologi med inriktningen kognitiv neurovetenskap. Mitt projekt involverar arbetsminnet och fokuserar på att karaktärisera arbetsminnets flexibilitet, degeneration och dess neuronala korrelat när det kommer till prestation i arbetsminnesuppgifter. Projektet analyserar både beteendedata och data insamlat med hjälp av hjärnavbildningsmetoden funktionell magnetröntgen (fMRI). Slutligen kommer projektet att, med hjälp av insamlad data, skapa beräkningsmodeller av arbetsminnet.
Jag arbetar även delvis med Stefan Wiens i projekt som undersöker medvetandes neuronala korrelat med hjälp av hjärnavbildningsmetoden elektroencefalografi (EEG) och analysmetoden som analyserar event-relaterade potentialer (ERPs).
Handledare: Rita Almeida (Stockholms universitet). Biträdande handledare: Ronald van den Berg (Stockholms universitet) and Mikael Lundqvist (Karolinska Institutet).
Publikationer
I urval från Stockholms universitets publikationsdatabas
-
Neural electrophysiological correlates of detection and identification awareness
2023. Stefan Wiens, Annika Andersson, Josef Gravenfors. Cognitive, Affective, & Behavioral Neuroscience 23, 1303-1321
ArtikelLäs mer om Neural electrophysiological correlates of detection and identification awarenessHumans have conscious experiences of the events in their environment. Previous research from electroencephalography (EEG) has shown visual awareness negativity (VAN) at about 200 ms to be a neural correlate of consciousness (NCC). However, when considering VAN as an NCC, it is important to explore which particular experiences are associated with VAN. Recent research proposes that VAN is an NCC of lower-level experiences (detection) rather than higher-level experiences (identification). However, previous results are mixed and have several limitations. In the present study, the stimulus was a ring with a Gabor patch tilting either left or right. On each trial, subjects rated their awareness on a three-level perceptual awareness scale that captured both detection (something vs. nothing) and identification (identification vs. something). Separate staircases were used to adjust stimulus opacity to the detection threshold and the identification threshold. Bayesian linear mixed models provided extreme evidence (BF10 = 131) that VAN was stronger at the detection threshold than at the identification threshold. Mean VAN decreased from -2.12 microV [-2.86, -1.42] at detection to -0.46 microV [-0.79, -0.11] at identification. These results strongly support the claim that VAN is an NCC of lower-level experiences of seeing something rather than of higher-level experiences of specific properties of the stimuli. Thus, results are consistent with recurrent processing theory in that phenomenal visual consciousness is reflected by VAN. Further, results emphasize that it is important to consider the level of experience when searching for NCC.
Visa alla publikationer av Annika Andersson vid Stockholms universitet