title: Not all attention orienting is created equal: recognition memory is enhanced when attention orienting involves distractor suppression.
abstract: Learning through visual exploration often requires orienting of attention to meaningful information in a cluttered world. Previous work has shown that attention modulates visual cortex activity, with enhanced activity for attended targets and suppressed activity for competing inputs, thus enhancing the visual experience. Here we examined the idea that learning may be engaged differentially with variations in attention orienting mechanisms that drive eye movements during visual search and exploration. We hypothesized that attention orienting mechanisms that engaged suppression of a previously attended location would boost memory encoding of the currently attended target objects to a greater extent than those that involve target enhancement alone. To test this hypothesis we capitalized on the classic spatial cueing task and the inhibition of return (IOR) mechanism (Posner, 1980; Posner, Rafal, & Choate, 1985) to demonstrate that object images encoded in the context of concurrent suppression at a previously attended location were encoded more effectively and remembered better than those encoded without concurrent suppression. Furthermore, fMRI analyses revealed that this memory benefit was driven by attention modulation of visual cortex activity, as increased suppression of the previously attended location in visual cortex during target object encoding predicted better subsequent recognition memory performance. These results suggest that not all attention orienting impacts learning and memory equally.
authors.affiliation: Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Providence, RI 02912, United States. Electronic address: julie_markant@brown.edu.
authors.forename: Julie
authors.initials: J
authors.lastname: Markant
authors.affiliation: Department of Neuroscience, Brown University, Providence, RI 02912, United States.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Worden
authors.affiliation: Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Providence, RI 02912, United States.
authors.forename: Dima
authors.initials: D
authors.lastname: Amso
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology; D003463:Cues; D053483:Eye Movement Measurements; D005260:Female; D059907:Functional Neuroimaging; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D021641:Recognition, Psychology / Q000502:physiology*; D065853:Spatial Learning / Q000502:physiology; D014793:Visual Cortex / Q000502:physiology; D055815:Young Adult
keywords: Distractor suppression; Recognition memory; Selective attention; Spatial cueing