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Comparing Neural Correlates of Conscious and Unconscious Working Memory
Umeå University, Faculty of Social Sciences, Department of Psychology.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Until recently, subliminally encoded memory retention has been considered too brief to study with functional magnetic resonance imaging (fMRI). However, this fMRI study compared conscious and unconscious working memory to find qualitative and/or quantitative differences. An attentional blink paradigm was used, the first target was a math task, and the second target was one of four letters. There were 22 participants, 11 female, at 20-28 years. A three-scaled perceptual awareness scale was used to measure subjective awareness, with significant, p < .001, long lasting (M = 10s) subliminally encoded working memory retention. There was a qualitative and quantitative difference in activity between conscious and unconscious encoding and retrieval, but no difference during maintenance. Unconscious maintenance showed right mid-DLPFC activity compared to baseline. The result supports the controversial claim that subliminal information can activate mid-DLPFC.

Place, publisher, year, edition, pages
2012. , 60 p.
National Category
URN: urn:nbn:se:umu:diva-54009OAI: diva2:514903
Subject / course
Masteruppsats i kognitionsvetenskap
Educational program
Masterprogrammet i kognitionsvetenskap
Available from: 2012-04-11 Created: 2012-04-11 Last updated: 2012-04-11Bibliographically approved

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