Letters lost: capturing appearance in crowded peripheral vision reveals a new kind of masking

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • University of Bern
  • Universite Lille

Abstract

Peripheral vision is strongly limited by crowding, the deleterious influence of flanking items on target perception. Distinguishing what is seen from what is merely inferred in crowding is difficult because task demands and prior knowledge may influence observers’ reports. Here, we used a standard identification task in which participants were susceptible to these influences, and to minimize them, we used a free-report-and-drawing paradigm. Three letters were presented in the periphery. In Experiment 1, 10 participants were asked to identify the central target letter. In Experiment 2, 25 participants freely named and drew what they saw. When three identical letters were presented, performance was almost perfect in Experiment 1, but it was very poor in Experiment 2, in which most participants reported only two letters. Our study reveals limitations of standard crowding paradigms and uncovers a hitherto unrecognized effect that we call redundancy masking.

Details

Original languageEnglish
Pages (from-to)1082-1086
Number of pages5
JournalPsychological Science
Volume30
Issue number7
Early online date23 May 2019
Publication statusPublished - 1 Jul 2019

Keywords

  • visual perception, crowding, appearance