Exocentric Pointing in Three-Dimensional Space
| Autor: | Nicole Schoumans, Jan J. Denier van der Gon |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Adult
Male Adolescent Endocentric and exocentric Visual space Experimental and Cognitive Psychology Three-dimensional space 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Optics Vision Monocular Artificial Intelligence Humans 0501 psychology and cognitive sciences Computer vision Sensory cue Mathematics Psychological Tests business.industry Distance Perception 05 social sciences Sensory Systems Form Perception Ophthalmology Space Perception Pointer (computer programming) Female Oblique effect Artificial intelligence business Monocular vision Binocular vision 030217 neurology & neurosurgery |
| Zdroj: | Perception. 28:1265-1280 |
| ISSN: | 1468-4233 0301-0066 |
| DOI: | 10.1068/p2713 |
| Popis: | A study is reported of an exocentric pointing task in all three dimensions, in near space, with only two visible luminous objects—a pointer and a target. The task of the subject was to aim a pointer at a target. The results clearly show that visual space is not isotropic, since every set direction appeared to consist of two independent components—one in the projection onto a frontoparallel plane (tilt), the other in depth (slant). The tilt component shows a general trend across subjects, an oblique effect, and can be judged monocularly. The slant component is symmetrical in the mid-sagittal plane, requires the use of binocular information, and shows considerable differences between subjects. These differences seem to depend on the amount of binocular information used by each subject. There was a remarkably high level of consistency in the exocentric pointing, despite the absence of environmental cues. The within-subject consistency in the settings of the pointer corresponds to a consistency of about 1 min of arc in disparity of its tip, even though the pointer and target are separated by more than 5 deg. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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