On the control of visual fixation durations in free viewing of complex images

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

The mechanisms for the substantial variation in the durations of visual fixations in scene perception are not yet well understood. During free viewing of paintings, gaze-contingent irrelevant distractors (Exp. 1) and non-gaze-related time-locked display changes (Exp. 2) were presented. We demonstrated that any visual change-its onset and offset-prolongs the ongoing fixation (i.e., delays the following saccade), strongly suggesting that fixation durations are under the direct control of the stimulus information. The strongest influence of distraction was observed for fixations preceded by saccades within the parafoveal range (< 5A degrees of visual angle). We assume that these fixations contribute to the focal in contrast to the ambient mode of attention (Pannasch & Velichkovsky, Visual Cognition, 17, 1109-1131, 2009; Velichkovsky, Memory, 10, 405-419, 2002). Recent findings about two distinct "subpopulations of fixations," one under the direct and another under the indirect control of stimulation (e.g., Henderson & Smith, Visual Cognition, 17, 1055-1082, 2009), are reconsidered in view of these results.

Details

Original languageEnglish
Pages (from-to)1120-1132
Number of pages13
JournalAttention, Perception, and Psychophysics
Volume73
Issue number4
Publication statusPublished - May 2011
Peer-reviewedYes

External IDs

Scopus 79953086789
ORCID /0000-0002-6673-9591/work/142242336
WOS 000290313000015
PubMed 21271317

Keywords

Keywords

  • Distractor effect, Eye movements, Fixation duration, Modes of attention, Scene perception, Two visual pathways