scholarly journals Special edition. Visual perception and picture quality. 2. Visual motion perception and eye movement. 2-3. The eye accommodation and its application image quality evaluation.

1991 ◽  
Vol 45 (3) ◽  
pp. 310-314
Author(s):  
Nobuyuki Hiruma ◽  
Tsunehiro Takeda
Keyword(s):  
Image Quality ◽  
Visual Perception ◽  
Eye Movement ◽  
Motion Perception ◽  
Quality Evaluation ◽  
Visual Motion ◽  
Special Edition ◽  
Picture Quality ◽  
Image Quality Evaluation ◽  
Visual Motion Perception

Changing Pitch of Sounds Alters Perceived Visual Motion Trajectory

2013 ◽  
Vol 26 (4) ◽  
pp. 317-332 ◽  
Author(s):  
Yasuhiro Takeshima ◽  
Jiro Gyoba
Keyword(s):  
Visual Field ◽  
Visual Perception ◽  
Motion Perception ◽  
Visual Motion ◽  
Auditory Stimuli ◽  
Motion Trajectory ◽  
Illusory Motion ◽  
Central Visual Field ◽  
Visual Motion Perception ◽  
Visual Inputs

Several studies have examined the effects of auditory stimuli on visual perception. In studies of cross-modal correspondences, auditory pitch has been shown to modulate visual motion perception. In particular, low-reliability visual motion stimuli tend to be affected by metaphorically or physically congruent or incongruent sounds. In the present study, we examined the modulatory effects of auditory pitch on visual perception of motion trajectory for visual inputs of varying reliability. Our results indicated that an auditory pitch implying the illusory motion toward the outside of the visual field-modulated perceived motion trajectory. In contrast, auditory pitch implying the illusory motion toward the central visual field did not affect the perception of motion trajectory. This asymmetrical effect of auditory stimuli occurred depending on the reliability of the visual input. Moreover, sounds that corresponded in terms of their pitch-elevation mapping altered the perception of the trajectory of visual motion when apparent motion could be perceived smoothly. Therefore, the present results demonstrate that auditory stimuli modulate visual motion perception especially when smooth motion is perceived in the peripheral visual field.

scholarly journals Expectations about motion direction affect perception and anticipatory smooth pursuit differently

2020 ◽  
Author(s):  
Xiuyun Wu ◽  
Austin C. Rothwell ◽  
Miriam Spering ◽  
Anna Montagnini
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Motion Perception ◽  
Smooth Pursuit ◽  
Visual Motion ◽  
Motion Direction ◽  
Visual Motion Perception ◽  
Low Coherence ◽  
Pursuit Eye Movements ◽  
Pursuit Velocity

AbstractSmooth pursuit eye movements and visual motion perception rely on the integration of current sensory signals with past experience. Experience shapes our expectation of current visual events and can drive eye movement responses made in anticipation of a target, such as anticipatory pursuit. Previous research revealed consistent effects of expectation on anticipatory pursuit—eye movements follow the expected target direction or speed—and contrasting effects on motion perception, but most studies considered either eye movement or perceptual responses. The current study directly compared effects of direction expectation on perception and anticipatory pursuit within the same direction discrimination task to investigate whether both types of responses are affected similarly or differently. Observers (n = 10) viewed high-coherence random-dot kinematograms (RDKs) moving rightward and leftward with a probability of 50, 70, or 90% in a given block of trials to build up an expectation of motion direction. They were asked to judge motion direction of interleaved low-coherence RDKs (0-15%). Perceptual judgements were compared to changes in anticipatory pursuit eye movements as a function of probability. Results show that anticipatory pursuit velocity scaled with probability and followed direction expectation (attraction bias), whereas perceptual judgments were biased opposite to direction expectation (repulsion bias). Control experiments suggest that the repulsion bias in perception was not caused by retinal slip induced by anticipatory pursuit, or by motion adaptation. We conclude that direction expectation can be processed differently for perception and anticipatory pursuit.

Sign in / Sign up

Export Citation Format

Share Document