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Psychol Sci. 2016 Jun;27(6):870-84. doi: 10.1177/0956797616640237. Epub 2016 May 3.

Searching for Category-Consistent Features: A Computational Approach to Understanding Visual Category Representation.

Author information

1
Department of Computer Science.
2
Department of Psychology, Stony Brook University.
3
Department of Computer Science Department of Psychology, Stony Brook University Gregory.Zelinsky@stonybrook.edu.

Abstract

This article introduces a generative model of category representation that uses computer vision methods to extract category-consistent features (CCFs) directly from images of category exemplars. The model was trained on 4,800 images of common objects, and CCFs were obtained for 68 categories spanning subordinate, basic, and superordinate levels in a category hierarchy. When participants searched for these same categories, targets cued at the subordinate level were preferentially fixated, but fixated targets were verified faster when they followed a basic-level cue. The subordinate-level advantage in guidance is explained by the number of target-category CCFs, a measure of category specificity that decreases with movement up the category hierarchy. The basic-level advantage in verification is explained by multiplying the number of CCFs by sibling distance, a measure of category distinctiveness. With this model, the visual representations of real-world object categories, each learned from the vast numbers of image exemplars accumulated throughout everyday experience, can finally be studied.

KEYWORDS:

categorical features; categorical search; categorization; category hierarchies; category representation; generative models

PMID:
27142461
PMCID:
PMC4899225
DOI:
10.1177/0956797616640237
[Indexed for MEDLINE]
Free PMC Article

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