title: Principal component analysis of the memory load effect in a change detection task.
abstract: Previous research using the change detection task has found little or no relationship between P3 amplitude and working memory load. This contrasts with findings from other paradigms that indicate a decrease in P3 amplitude with increases in working memory load. We adopted a principal component analysis strategy to resolve this discrepancy. After ERPs were decomposed, the P3 component decreased in amplitude when the memory load increased. Its amplitude was also associated with individuals' working memory capacity. In conclusion, P3 plays a critical role in change detection task as it does in other working memory tasks.
authors.affiliation: Department of Psychology and the Center for Human Psychophysiology, Miami University, United States.
authors.forename: Li
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Department of Psychology and the Center for Human Psychophysiology, Miami University, United States.
authors.forename: Robin D
authors.initials: RD
authors.lastname: Thomas
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D025341:Principal Component Analysis; D011930:Reaction Time; D021641:Recognition, Psychology / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Change detection task; Event-related potentials; P3; PCA; Visual working memory