Negative priming for unfamiliar shapes occurs under covert attention

K. S. Frieder, Marisa Carrasco-Queijeiro

Research output: Contribution to journalArticle

Abstract

Introduction & Goal: In this study, for the first time, we explored whether the selective processing of an unfamiliar shape at the attended location is influenced by information outside the locus of attention even when the short duration of the display precluded eye movements. We examined the effects of a distracter in the unattended hemifield on the processing of the target in the attended hemifield. Method: To test the effect of unattended items, we employed a modified Negative Priming (NP) task that required a symmetry judgment of a target. Observers viewed a series of displays with a pair of overlapping shapes (a lateralized green target was overlapping a red distracter). Observers had to determine whether the target was symmetrical or not. Experimental trials were paired so that a "Prime" trial was followed by a "Test" trial. Following a negative priming paradigm, unbeknownst to the observers, in the Priming Condition, the red overlapping-distracter in the Prime trial re-appeared as the green target in the following Test trial. In the Control Condition, all the shapes were novel. In Condition 1, nothing appeared in the opposite hemifield; in Condition 2 an additional black shape appeared contralaterally. RTs and errors were analyzed. Results and Conclusion: For the first time, we report a highly significant NP effect for unfamiliar shapes under covert attention. More specifically, RTs and errors were higher when the target was seen previously as the overlapping-distracter than when the target was novel. Surprisingly, even when the display was presented for less than 200ms, participants processed the task-irrelevant overlapping-distracter, in all three conditions. Thus, NP for unfamiliar shapes occurs under covert attention.

Original languageEnglish (US)
JournalJournal of Vision
Volume1
Issue number3
DOIs
StatePublished - 2001

Fingerprint

Eye Movements

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Negative priming for unfamiliar shapes occurs under covert attention. / Frieder, K. S.; Carrasco-Queijeiro, Marisa.

In: Journal of Vision, Vol. 1, No. 3, 2001.

Research output: Contribution to journalArticle

Frieder, K. S. ; Carrasco-Queijeiro, Marisa. / Negative priming for unfamiliar shapes occurs under covert attention. In: Journal of Vision. 2001 ; Vol. 1, No. 3.
@article{b085a90e972f4802a7da342f6bbe9ac1,
title = "Negative priming for unfamiliar shapes occurs under covert attention",
abstract = "Introduction & Goal: In this study, for the first time, we explored whether the selective processing of an unfamiliar shape at the attended location is influenced by information outside the locus of attention even when the short duration of the display precluded eye movements. We examined the effects of a distracter in the unattended hemifield on the processing of the target in the attended hemifield. Method: To test the effect of unattended items, we employed a modified Negative Priming (NP) task that required a symmetry judgment of a target. Observers viewed a series of displays with a pair of overlapping shapes (a lateralized green target was overlapping a red distracter). Observers had to determine whether the target was symmetrical or not. Experimental trials were paired so that a {"}Prime{"} trial was followed by a {"}Test{"} trial. Following a negative priming paradigm, unbeknownst to the observers, in the Priming Condition, the red overlapping-distracter in the Prime trial re-appeared as the green target in the following Test trial. In the Control Condition, all the shapes were novel. In Condition 1, nothing appeared in the opposite hemifield; in Condition 2 an additional black shape appeared contralaterally. RTs and errors were analyzed. Results and Conclusion: For the first time, we report a highly significant NP effect for unfamiliar shapes under covert attention. More specifically, RTs and errors were higher when the target was seen previously as the overlapping-distracter than when the target was novel. Surprisingly, even when the display was presented for less than 200ms, participants processed the task-irrelevant overlapping-distracter, in all three conditions. Thus, NP for unfamiliar shapes occurs under covert attention.",
author = "Frieder, {K. S.} and Marisa Carrasco-Queijeiro",
year = "2001",
doi = "10.1167/1.3.211",
language = "English (US)",
volume = "1",
journal = "Journal of Vision",
issn = "1534-7362",
publisher = "Association for Research in Vision and Ophthalmology Inc.",
number = "3",

}

TY - JOUR

T1 - Negative priming for unfamiliar shapes occurs under covert attention

AU - Frieder, K. S.

AU - Carrasco-Queijeiro, Marisa

PY - 2001

Y1 - 2001

N2 - Introduction & Goal: In this study, for the first time, we explored whether the selective processing of an unfamiliar shape at the attended location is influenced by information outside the locus of attention even when the short duration of the display precluded eye movements. We examined the effects of a distracter in the unattended hemifield on the processing of the target in the attended hemifield. Method: To test the effect of unattended items, we employed a modified Negative Priming (NP) task that required a symmetry judgment of a target. Observers viewed a series of displays with a pair of overlapping shapes (a lateralized green target was overlapping a red distracter). Observers had to determine whether the target was symmetrical or not. Experimental trials were paired so that a "Prime" trial was followed by a "Test" trial. Following a negative priming paradigm, unbeknownst to the observers, in the Priming Condition, the red overlapping-distracter in the Prime trial re-appeared as the green target in the following Test trial. In the Control Condition, all the shapes were novel. In Condition 1, nothing appeared in the opposite hemifield; in Condition 2 an additional black shape appeared contralaterally. RTs and errors were analyzed. Results and Conclusion: For the first time, we report a highly significant NP effect for unfamiliar shapes under covert attention. More specifically, RTs and errors were higher when the target was seen previously as the overlapping-distracter than when the target was novel. Surprisingly, even when the display was presented for less than 200ms, participants processed the task-irrelevant overlapping-distracter, in all three conditions. Thus, NP for unfamiliar shapes occurs under covert attention.

AB - Introduction & Goal: In this study, for the first time, we explored whether the selective processing of an unfamiliar shape at the attended location is influenced by information outside the locus of attention even when the short duration of the display precluded eye movements. We examined the effects of a distracter in the unattended hemifield on the processing of the target in the attended hemifield. Method: To test the effect of unattended items, we employed a modified Negative Priming (NP) task that required a symmetry judgment of a target. Observers viewed a series of displays with a pair of overlapping shapes (a lateralized green target was overlapping a red distracter). Observers had to determine whether the target was symmetrical or not. Experimental trials were paired so that a "Prime" trial was followed by a "Test" trial. Following a negative priming paradigm, unbeknownst to the observers, in the Priming Condition, the red overlapping-distracter in the Prime trial re-appeared as the green target in the following Test trial. In the Control Condition, all the shapes were novel. In Condition 1, nothing appeared in the opposite hemifield; in Condition 2 an additional black shape appeared contralaterally. RTs and errors were analyzed. Results and Conclusion: For the first time, we report a highly significant NP effect for unfamiliar shapes under covert attention. More specifically, RTs and errors were higher when the target was seen previously as the overlapping-distracter than when the target was novel. Surprisingly, even when the display was presented for less than 200ms, participants processed the task-irrelevant overlapping-distracter, in all three conditions. Thus, NP for unfamiliar shapes occurs under covert attention.

UR - http://www.scopus.com/inward/record.url?scp=4143052612&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4143052612&partnerID=8YFLogxK

U2 - 10.1167/1.3.211

DO - 10.1167/1.3.211

M3 - Article

AN - SCOPUS:4143052612

VL - 1

JO - Journal of Vision

JF - Journal of Vision

SN - 1534-7362

IS - 3

ER -