Perception
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Intraattribute and Interattribute Motion Induction
Perception - Tập 23 Số 8 - Trang 913-928 - 1994
The phenomenon of motion induction occurs, for example, when a bar that is
presented next to a spot, which itself was presented slightly earlier, is not
correctly perceived to appear everywhere simultaneously, but seems to grow out
of the spot. The spot is said to prime one end of the bar. Experiments have been
designed to throw more light on the local and global aspects of this phenomenon,
in par...
Amplitude Spectra of Line-Motion Stimuli
Perception - Tập 40 Số 6 - Trang 656-673 - 2011
The line-motion illusion has been regarded as the result of attention. An
alternative interpretation is that the illusion is related to apparent motion
which would predict the stimuli to contain motion energy associated with the
direction of the illusory motion. In order to examine this possibility Fourier
transforms of x – t plots of line-motion stimuli were generated under a variety
of condition...
Processing Time of Contour Integration: The Role of Colour, Contrast, and Curvature
Perception - Tập 30 Số 7 - Trang 833-853 - 2001
We investigated the temporal properties of the red-green, blue – yellow, and
luminance mechanisms in a contour-integration task which required the linking of
orientation across space to detect a ‘path’. Reaction times were obtained for
simple detection of the stimulus regardless of the presence of a path, and for
path detection measured by a yes/no procedure with path and no-path stimuli
randomly ...
Predicting the Future Position of a Moving Target
Perception - Tập 20 Số 1 - Trang 5-16 - 1991
Three experiments were conducted to examine the processes underlying the
prediction of the future position of a moving target. A target moved
horizontally across a computer screen at constant velocity, disappearing partway
across the screen, and subjects responded when they estimated the target would
have passed a point on the far side of the screen, had it continued on its path.
The first experim...
When is Motion ‘Motion’?
Perception - Tập 37 Số 4 - Trang 624-627 - 2008
Examples of visual motion have become more and more abstract over the years,
leading up to ‘third-order’ stimuli where direction is actually determined by
the observer through top–down attention. But how far can this be pushed—are
there motion stimuli that are yet more arbitrary and abstract? Actually, there
is a broad class of ‘conceptual motion’ stimuli—things like a moving grating of
faces, or ...
Timing Accuracy in Motion Extrapolation: Reverse Effects of Target Size and Visible Extent of Motion at Low and High Speeds
Perception - Tập 32 Số 6 - Trang 699-706 - 2003
By varying target size, speed, and extent of visible motion we examined the
timing accuracy in motion extrapolation. Small or large targets (0.2 or 0.8 deg)
moved at either 2.5, 5, or 10 deg s−1 across a horizontal path (2.5 or 10 deg)
and then vanished behind an occluder. Observers responded when they judged that
the target had reached a randomly specified position between 0 and 12 deg. With
high...
The Relationship between Visual Persistence and Event Perception in Bistable Motion Display
Perception - Tập 19 Số 4 - Trang 437-445 - 1990
observers viewed two alternating frames, each consisting of three rectangular
bars displaced laterally by one cycle in one frame with respect to the other. At
long interframe intervals (IFIs) observers perceived a group of three bars
moving as a whole (group motion), and at short IFIs the overlapping elements in
the two frames appeared stationary, while the third element appeared to move
from one ...
The Evolution of Explanations of a Perceptual Phenomenon: A Case History Using the Ternus Effect
Perception - Tập 35 Số 6 - Trang 807-821 - 2006
The Ternus effect involves a multi-element stimulus that can lead to either of
two different percepts of apparent movement depending upon a variety of stimulus
conditions. Since Ternus's 1926 discussion of this phenomenon, many researchers
have attempted to explain it. We examine the history of explanations of the
Ternus effect and show that they have evolved to contemporary theoretical
positions ...
Spatial Correspondence and Relation Correspondence: Grouping Factors That Influence Perception of the Ternus Display
Perception - Tập 37 Số 5 - Trang 725-739 - 2008
We cite two different perceptual-correspondence principles whose emphasis can
help to disambiguate the otherwise ambiguous Ternus display in apparent movement
(a display that can alternately be seen in one of two possible configurations).
One of these principles is spatial correspondence, which emphasizes the
maintenance of similar stimulus elements in given locations over time. The other
principl...
Perceptual Organization of Apparent Motion in the Ternus Display
Perception - Tập 28 Số 7 - Trang 877-892 - 1999
A typical Ternus display has three sequentially presented frames, in which frame
1 consists of three motion tokens, frame 2 (blank) defines the interstimulus
interval, and frame 3 has similar motion tokens with their relative positions
shifted to the right. Interestingly, what appears to be a seemingly simple
arrangement of stimuli can induce one of two distinct apparent-motion percepts
in the obs...
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