Attention speeds processing across eccentricity: Feature and conjunction searches

Marisa Carrasco, Anna Marie Giordano, Brian McElree

Research output: Contribution to journalArticle

Abstract

We investigated whether the effect of covert attention on information accrual varies with eccentricity (4° vs 9°) and the complexity of the visual search task (feature vs conjunction). We used speed-accuracy tradeoff procedures to derive conjoint measures of the speed of information processing and accuracy in each search task. Information processing was slower with more complex conjunction searches than with simpler feature searches, and overall it was faster at peripheral (9°) than parafoveal (4°) locations in both search types. Covert attention increased discriminability and accelerated information accrual at both eccentricities, and the magnitude of this attentional effect was the same for both feature (simple) and conjunction (complex) searches. Interestingly, in contrast to the compensatory effect of covert attention on information processing at iso-eccentric locations (temporal performance fields), covert attention did not eliminate speed differences across eccentricity.

Original languageEnglish (US)
Pages (from-to)2028-2040
Number of pages13
JournalVision research
Volume46
Issue number13
DOIs
StatePublished - Jun 2006

Keywords

  • Attention
  • Eccentricity
  • Feature and conjunction search
  • Speed-accuracy tradeoff
  • Temporal information processing

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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