Delay of selective attention during the attentional blink.
The attentional blink is the inability to report the second of two targets in an RSVP stream when they are separated by 200-500 ms. Recent evidence shows that this failure results from three dissociable changes to the properties of temporal selective attention. During the attentional blink, selection is suppressed (items are selected less effectively, resulting in greater levels of random guessing), diffused (more letters around the target are selected), and delayed (the items that are selected tend to be later in the RSVP stream relative to the cue) [Vul, E., Nieuwenstein, M., & Kanwisher, N. (2008). Temporal selection is suppressed, delayed, and diffused during the attentional blink. Psychological Science, 19(1), 55-61]. Here we assess the properties of the delay in selection and evaluate how the delay contributes to the attentional blink. First, by pre-cueing, we manipulate the delay of selective attention and show that neither delay nor suppression alone is sufficient to account for the failure to report the second target; thus both play a role in the usual attentional blink. Second, we explore the persistence of the delay effect over much longer T1-T2 SOAs and show that the effect remains strong at lags of 1,400 ms and appears to subside with a time-constant of roughly 500 ms. Third, we manipulate RSVP rate and find that the "delay" of selection is a delay in time, independent of the number of items.
Vul
Edward
E
Department of Brain and Cognitive Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, 46-4141, Cambridge, MA 02139, USA. evul@mit.edu
Hanus
Deborah
D
Kanwisher
Nancy
N
D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology*; D054518:Attentional Blink / Q000502:physiology*; D003463:Cues; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology; D010775:Photic Stimulation / Q000379:methods; D011601:Psychophysics; D013997:Time Factors; D013998:Time Perception / Q000502:physiology