Oblique stimuli are seen best (not worst!) in naturalistic broad-band stimuli: a horizontal effect
| Autor: | Edward A. Essock, Bruce C. Hansen, Michael J. Sinai, J. Kevin DeFord |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Communication
Visual perception Horizontal and vertical Computer science business.industry media_common.quotation_subject Oblique case Broad band Horizontal effect Sensory Systems Contrast Sensitivity Ophthalmology Salience (neuroscience) Orientation Perception Visual Perception Anisotropy Humans Attention Oblique effect Computer vision Artificial intelligence business media_common |
| Zdroj: | Vision Research. 43:1329-1335 |
| ISSN: | 0042-6989 |
| Popis: | People with normal eyesight typically see horizontal and vertical gratings better than oblique gratings (Psychological Bulletin 78 (1972) 266; Perception 9 (1980) 37). In the present study we investigated whether this oblique effect anisotropy is still observed when viewing more complex visual stimuli that better correspond to the content encountered in everyday viewing of the world. We show that the ability to see oriented structure in an image consisting of broadband spatial content is indeed anisotropic, but that the pattern of this orientation bias is completely different from that obtained with simpler stimuli. Horizontal stimuli are seen worst and oblique stimuli are seen best when tested with more realistic broadband stimuli. We suggest that this “horizontal effect” would be useful in an evolutionary capacity by serving to discount the horizon and other oriented content that tends to dominate natural scenes and thereby increase the salience of objects contained in typical outdoor scenes. |
| Databáze: | OpenAIRE |
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