TY - JOUR
T1 - Nonmonotone backward masking functions and brightness reversals
AU - Stewart, Alan L.
AU - Purcell, Dean G.
AU - Pinkham, Roger S.
PY - 2011/10
Y1 - 2011/10
N2 - Increasing the target-field luminance aids detection for a simultaneously presented black target disc and a black masking annulus. At an intermediate interval separating the onset of the target from the mask, increasing the target-field luminance reduces target detection. This decrease in performance occurs with both temporal and spatial forced choice tasks. With a spatial forced choice, an observer's performance can fall below chance. We associate below-chance performance with a brightness reversal of the black target disc, such that the target disc appears brighter than its surround. The occurrence of brightness reversals follows from our model of the Broca-Sulzer effect, and nonmonotone masking functions result from a generalization of luminance summation.
AB - Increasing the target-field luminance aids detection for a simultaneously presented black target disc and a black masking annulus. At an intermediate interval separating the onset of the target from the mask, increasing the target-field luminance reduces target detection. This decrease in performance occurs with both temporal and spatial forced choice tasks. With a spatial forced choice, an observer's performance can fall below chance. We associate below-chance performance with a brightness reversal of the black target disc, such that the target disc appears brighter than its surround. The occurrence of brightness reversals follows from our model of the Broca-Sulzer effect, and nonmonotone masking functions result from a generalization of luminance summation.
KW - Brightness reversal
KW - Broca-Sulzer effect
KW - Metacontrast masking
KW - U-shaped functions
KW - Visual backward masking
UR - http://www.scopus.com/inward/record.url?scp=80155140154&partnerID=8YFLogxK
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U2 - 10.3758/s13414-011-0166-y
DO - 10.3758/s13414-011-0166-y
M3 - Article
AN - SCOPUS:80155140154
SN - 1943-3921
VL - 73
SP - 2180
EP - 2196
JO - Attention, Perception, and Psychophysics
JF - Attention, Perception, and Psychophysics
IS - 7
ER -