| Accuracy of stereomotion speed perception with persisting and dynamic textures. | |
| | |
MedLine Citation:
|
PMID: 21319629 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
It has been established that the motion in depth of stimuli visible to both eyes may be signalled binocularly either by a change of disparity over time or by the difference in the velocity of the images projected on each retina, known as an interocular velocity difference. A two-interval forced-choice stereomotion speed discrimination experiment was performed on four participants to ascertain the relative speed of a persistent random dot stereogram (RDS) and a dynamic RDS undergoing directly approaching or receding motion in depth. While the persistent RDS pattern involved identical dot patterns translating in opposite directions in each eye, and hence included both changing disparity and interocular velocity difference cues, the dynamic RDS pattern (which contains no coherent monocular motion signals) specified motion in depth through changing disparity, but no motion through interocular velocity difference. Despite an interocular velocity difference speed signal of zero motion in depth, the dynamic RDS stimulus appeared to move more rapidly. These observations are consistent with a scheme in which cues that rely on coherent monocular motion signals (such as looming and the interocular velocity difference cue) are less influential in dynamic stimuli due to their lack of reliability (i.e., increased noise). While dynamic RDS stimuli may be relatively unaffected by the contributions of such cues when they signal that the stimulus did not move in depth, the persistent RDS stimulus may retain a significant and conflicting contribution from the looming cue, resulting in a lower perceived speed. |
| | |
Authors:
|
Kevin R Brooks; Leland S Stone |
Related Documents
:
|
7362569 - Visual and postural motion aftereffects following parabolic flight. 21425699 - Illusory motion produced by dichoptic stimuli during saccades. 17920099 - Broadly tuned, view-specific coding of face shape: opposing figural aftereffects can be... 5796559 - Visual motion perception: experimental modification. 16806699 - Ventriloquism aftereffects occur in the rear hemisphere. 18951829 - The motion aftereffect reloaded. 1842369 - Abnormalities of erg in congenital aniridia. 8855349 - Receiver operating characteristic (roc) analysis of neural code efficacies. ii. optic n... 15380429 - Capturing drops with a thin fiber. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Perceptual and motor skills Volume: 111 ISSN: 0031-5125 ISO Abbreviation: Percept Mot Skills Publication Date: 2010 Dec |
Date Detail:
|
Created Date: 2011-02-15 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0401131 Medline TA: Percept Mot Skills Country: United States |
Other Details:
|
Languages: eng Pagination: 921-35 Citation Subset: IM |
Affiliation:
|
NASA Ames Research Center, Department of Psychology, Macquarie University, NSW, Australia. kevin.brooks@mq.edu.au |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Meditation and attention: a comment on a recent article.
Next Document: Validation of the DynaPort MiniMod during sleep: a pilot study.