Visual training improves perceptual grouping based on basic stimulus features
| Autor: | Richard Waxman, Steven M. Silverstein, Rachel Kidron, Daniel D. Kurylo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Linguistics and Language Visual perception Adolescent Color vision media_common.quotation_subject Motion Perception Experimental and Cognitive Psychology Stimulus (physiology) 050105 experimental psychology Language and Linguistics Visual processing Young Adult 03 medical and health sciences 0302 clinical medicine Perceptual learning Orientation Perception Psychophysics Humans Learning 0501 psychology and cognitive sciences Motion perception Vision Ocular media_common Communication business.industry 05 social sciences Sensory Systems Visual Perception Female Psychology business Color Perception Photic Stimulation 030217 neurology & neurosurgery Cognitive psychology |
| Zdroj: | Attention, Perception, & Psychophysics. 79:2098-2107 |
| ISSN: | 1943-393X 1943-3921 |
| DOI: | 10.3758/s13414-017-1368-8 |
| Popis: | Training on visual tasks improves performance on basic and higher order visual capacities. Such improvement has been linked to changes in connectivity among mediating neurons. We investigated whether training effects occur for perceptual grouping. It was hypothesized that repeated engagement of integration mechanisms would enhance grouping processes. Thirty-six participants underwent 15 sessions of training on a visual discrimination task that required perceptual grouping. Participants viewed 20 × 20 arrays of dots or Gabor patches and indicated whether the array appeared grouped as vertical or horizontal lines. Across trials stimuli became progressively disorganized, contingent upon successful discrimination. Four visual dimensions were examined, in which grouping was based on similarity in luminance, color, orientation, and motion. Psychophysical thresholds of grouping were assessed before and after training. Results indicate that performance in all four dimensions improved with training. Training on a control condition, which paralleled the discrimination task but without a grouping component, produced no improvement. In addition, training on only the luminance and orientation dimensions improved performance for those conditions as well as for grouping by color, on which training had not occurred. However, improvement from partial training did not generalize to motion. Results demonstrate that a training protocol emphasizing stimulus integration enhanced perceptual grouping. Results suggest that neural mechanisms mediating grouping by common luminance and/or orientation contribute to those mediating grouping by color but do not share resources for grouping by common motion. Results are consistent with theories of perceptual learning emphasizing plasticity in early visual processing regions. |
| Databáze: | OpenAIRE |
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