Perceived Shrinkage of Motion Paths
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| Title: | Perceived Shrinkage of Motion Paths |
|---|---|
| Language: | English |
| Authors: | Sinico, Michele, Parovel, Giulia, Casco, Clara, Anstis, Stuart |
| Source: | Journal of Experimental Psychology: Human Perception and Performance. Aug 2009 35(4):948-957. |
| Availability: | American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org/publications |
| Peer Reviewed: | Y |
| Page Count: | 10 |
| Publication Date: | 2009 |
| Document Type: | Journal Articles Reports - Research |
| Descriptors: | Foreign Countries, Observation, Motion, Computation |
| Geographic Terms: | Italy |
| DOI: | 10.1037/a0014257 |
| ISSN: | 0096-1523 |
| Abstract: | We show that human observers strongly underestimate a linear or circular trajectory that a luminous spot follows in the dark. At slow speeds, observers are relatively accurate, but, as the speed increases, the size of the path is progressively underestimated, by up to 35%. The underestimation imposes little memory load and does not require tracking of the trajectory. Most importantly, we found that underestimation occurred only when successive motion vectors changed in direction. This suggests a perceptual rather than representational origin of the illusion, related to vector-sum integration over time of neural motion signals in different directions. (Contains 3 footnotes and 9 figures.) |
| Abstractor: | As Provided |
| Number of References: | 32 |
| Entry Date: | 2009 |
| Accession Number: | EJ860091 |
| Database: | ERIC |
| Abstract: | We show that human observers strongly underestimate a linear or circular trajectory that a luminous spot follows in the dark. At slow speeds, observers are relatively accurate, but, as the speed increases, the size of the path is progressively underestimated, by up to 35%. The underestimation imposes little memory load and does not require tracking of the trajectory. Most importantly, we found that underestimation occurred only when successive motion vectors changed in direction. This suggests a perceptual rather than representational origin of the illusion, related to vector-sum integration over time of neural motion signals in different directions. (Contains 3 footnotes and 9 figures.) |
|---|---|
| ISSN: | 0096-1523 |
| DOI: | 10.1037/a0014257 |
