期刊
PSYCHOLOGICAL SCIENCE
卷 28, 期 10, 页码 1510-1517出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/0956797617713787
关键词
color perception; visual search; ensemble representation; summary statistics; priming of pop-out; open data; open materials
资金
- Russian Foundation for Humanities [15-36-01358A2]
- Icelandic Research Fund [152427]
- research fund of the University of Iceland
Colors are rarely uniform, yet little is known about how people represent color distributions. We introduce a new method for studying color ensembles based on intertrial learning in visual search. Participants looked for an oddly colored diamond among diamonds with colors taken from either uniform or Gaussian color distributions. On test trials, the targets had various distances in feature space from the mean of the preceding distractor color distribution. Targets on test trials therefore served as probes into probabilistic representations of distractor colors. Test-trial response times revealed a striking similarity between the physical distribution of colors and their internal representations. The results demonstrate that the visual system represents color ensembles in a more detailed way than previously thought, coding not only mean and variance but, most surprisingly, the actual shape (uniform or Gaussian) of the distribution of colors in the environment.
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