The role of gist in scene recognition

Anthony Chad Sampanes, Philip Tseng, Bruce Bridgeman

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Studies of change blindness suggest that we bring only a few attended features of a scene, plus a gist, from one visual fixation to the next. We examine the role of gist by substituting an original image with a second image in which a substitution of one object changes the gist, compared with a third image in which a substitution of that object does not change the gist. Small perceptual changes that affect gist were more rapidly detected than perceptual changes that do not affect gist. When the images were scrambled to remove meaning, this difference disappeared for seven of the nine sets, indicating that gist and not image features dominated the result. In a final experiment a natural image was masked with an 8 × 8 checker pattern, and progressively substituted by squares of a new natural image of the same gist. Spatial jitter prevented fixation on the same square for the sequence of 12 changes. Observers detected a change in an average of 2.1 out of 7 sequences, indicating strong change blindness for images of the same gist but completely different local features. We conclude that gist is automatically encoded, separately from specific features.

Original languageEnglish
Pages (from-to)2275-2283
Number of pages9
JournalVision Research
Volume48
Issue number21
DOIs
Publication statusPublished - Sep 2008
Externally publishedYes

Keywords

  • Attention
  • Change blindness
  • Eye movements
  • Gist
  • Scene perception

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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