Conference Proceeding Article
To find out how the representations of structured visual objects depend on the co-occurrence statistics of their constituents, we exposed subjects to a set of composite images with tight control exerted over (1) the conditional probabilities of the constituent fragments, and (2) the value of Barlow's criterion of "suspicious coincidence" (the ratio of joint probability to the product of marginals). We then compared the part verification response times for various probe/target combinations before and after the exposure. For composite probes, the speedup was much larger for targets that contained pairs of fragments perfectly predictive of each other, compared to those that did not. This effect was modulated by the significance of their co-occurrence as estimated by Barlow's criterion. For lone-fragment probes, the speedup in all conditions was generally lower than for composites. These results shed light on the brain's strategies for unsupervised acquisition of structural information in vision.
Learning, modeling, visual struction, structural information, brain
Cognition and Perception
Advances in Neural Information Processing Systems 14 (NIPS 2001): Proceedings of the 2001 Conference
City or Country
Edelman, Shimon, Benjamin P. Hiles, YANG Hwajin and Nathan Intrator. 2002. "Probabilistic Principles in Unsupervised Learning of Visual Structure: Human Data and a Model." In Advances in Neural Information Processing Systems, 14, 19-26. Cambridge, MA: MIT Press.