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Abstract:
Abstract: The binding of stimulus attributes is presumed to
require spatiotemporal continuity (Kahneman, Triesman, & Gibbs,
1992). We show that accuracy of reporting the identity of a moving
numeral is negatively affected by changing incidental visual
features (frame color and shape) even when the numeral and features
are presented at different places and times.We previously reported
(Object Perception and Memory conference, 1998), that if one of two
moving numerals maintained identity and features, performance was
often better than if the features changed (consonance). If a
numeral changed identity but not features, performance was worse
than if features also changed (dissonance). The contrasting effects
of feature maintenance may reflect binding of identity and features
in a short (<= 200 ms) event. Here, we compared performance
in two motion conditions. Identity and features were unified for 6
exposures of 13 ms, followed by a 54 ms target display, or identity
and visual features alternated along the movement trajectory (6
exposures of 27 ms), and were only presented together in the same
target exposure. Dissonance effects were substantial and equivalent
for both conditions. The reliance upon features in maintaining
object continuity in this task is unaffected by alternating
presentation of stimulus components; binding across a motion event
may occur even if identity and features are merely consistent with
a trajectory and not presented simultaneously.
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