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Visual Fixation Durations and Saccade Amplitudes: Shifting Relationship in a Variety of Conditions
oleh: Sebastian Pannasch, Jens R. Helmert, Katharina Roth, Ann-Katrin Herbold, Henrik Walter
Format: | Article |
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Diterbitkan: | Bern Open Publishing 2008-12-01 |
Deskripsi
Is there any relationship between visual fixation durations and saccade amplitudes in free exploration of pictures and scenes? In four experiments with naturalistic stimuli, we compared eye movements during early and late phases of scene perception. Influences of repeated presentation of similar stimuli (Experiment 1), object density (Experiment 2), emotional stimuli (Experiment 3) and mood induction (Experiment 4) were examined. The results demonstrate a systematic increase in the durations of fixations and a decrease for saccadic amplitudes over the time course of scene perception. This relationship was very stable across the variety of studied conditions. It can be interpreted in terms of a shifting balance of the two modes of visual information processing.