TY - JOUR
T1 - Expecting the initial glimpse: prior target knowledge activation or repeated search does not eliminate scene preview search benefits
AU - Litchfield, Damien
AU - Donovan, T.
PY - 2019/1/2
Y1 - 2019/1/2
N2 - A brief glimpse of a scene can guide subsequent eye movement behaviour but it is still unclear how prior activation of target knowledge influences early scene processing and later eye movements. Using the gaze-contingent ‘flash-preview moving window’ (FPMW) paradigm to restrict access of peripheral vision during visual search, we manipulated whether identity of search targets was presented before or after scene previews. As expected, windowed search for a target was more efficient following a 250ms scene preview, whereas knowing the target identity prior to scene preview led to further improvements in how search was initiated and executed. However, in Experiment 2 when the target was not present during scene previews, only metrics reflecting the initiation of search continued to be modulated by prior activation of target knowledge. Experiment 3 provided new evidence to suggest that the search benefits from scene previews are maintained even when participants are repeatedly searching through the same type of scene for the same type of target. Experiment 4 replicated Experiment 3 whilst also controlling for differences in integration times. We discuss the robust findings of scene preview search benefits and the flexibility of the FPMW paradigm to measure how the first glimpse affects search.
AB - A brief glimpse of a scene can guide subsequent eye movement behaviour but it is still unclear how prior activation of target knowledge influences early scene processing and later eye movements. Using the gaze-contingent ‘flash-preview moving window’ (FPMW) paradigm to restrict access of peripheral vision during visual search, we manipulated whether identity of search targets was presented before or after scene previews. As expected, windowed search for a target was more efficient following a 250ms scene preview, whereas knowing the target identity prior to scene preview led to further improvements in how search was initiated and executed. However, in Experiment 2 when the target was not present during scene previews, only metrics reflecting the initiation of search continued to be modulated by prior activation of target knowledge. Experiment 3 provided new evidence to suggest that the search benefits from scene previews are maintained even when participants are repeatedly searching through the same type of scene for the same type of target. Experiment 4 replicated Experiment 3 whilst also controlling for differences in integration times. We discuss the robust findings of scene preview search benefits and the flexibility of the FPMW paradigm to measure how the first glimpse affects search.
KW - flash-preview moving window
KW - eye movements
KW - scene perception
KW - expectation
KW - visual search
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U2 - 10.1080/20445911.2018.1555163
DO - 10.1080/20445911.2018.1555163
M3 - Article (journal)
SN - 2044-592x
VL - 31
SP - 49
EP - 63
JO - Journal of Cognitive Psychology
JF - Journal of Cognitive Psychology
IS - 1
ER -