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2015 ; 6
(5
): 2041669515606007
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Seeing Objects as Faces Enhances Object Detection
#MMPMID27648219
Takahashi K
; Watanabe K
Iperception
2015[Oct]; 6
(5
): 2041669515606007
PMID27648219
show ga
The face is a special visual stimulus. Both bottom-up processes for low-level
facial features and top-down modulation by face expectations contribute to the
advantages of face perception. However, it is hard to dissociate the top-down
factors from the bottom-up processes, since facial stimuli mandatorily lead to
face awareness. In the present study, using the face pareidolia phenomenon, we
demonstrated that face awareness, namely seeing an object as a face, enhances
object detection performance. In face pareidolia, some people see a visual
stimulus, for example, three dots arranged in V shape, as a face, while others do
not. This phenomenon allows us to investigate the effect of face awareness
leaving the stimulus per se unchanged. Participants were asked to detect a face
target or a triangle target. While target per se was identical between the two
tasks, the detection sensitivity was higher when the participants recognized the
target as a face. This was the case irrespective of the stimulus eccentricity or
the vertical orientation of the stimulus. These results demonstrate that seeing
an object as a face facilitates object detection via top-down modulation. The
advantages of face perception are, therefore, at least partly, due to face
awareness.