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Home Research Topics Scene Viewing Rothkegel, Trukenbrod, Schütt, Wichmann & Engbert (Vision Research 2016). Influence of initial fixation position in scene viewing.

Rothkegel, Trukenbrod, Schütt, Wichmann & Engbert (Vision Research 2016). Influence of initial fixation position in scene viewing.

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During scene perception our eyes generate complex sequences of fixations. Predictors of fixation locations are bottom-up factors such as luminance contrast, top-down factors like viewing instruction, and systematic biases, e.g., the tendency to place fixations near the center of an image. However, comparatively little is known about the dynamics of scanpaths after experimental manipulation of specific fixation locations. Here we investigate the influence of initial fixation position on subsequent eye-movement behavior on an image. We presented 64 colored photographs to participants who started their scanpaths from one of two experimentally controlled positions in the right or left part of an image. Additionally, we used computational models to predict the images’ fixation locations and classified them as balanced images or images with high conspicuity on either the left or right side of a picture. The manipulation of the starting position influenced viewing behavior for several seconds and produced a tendency to overshoot to the image side opposite to the starting position. Possible mechanisms for the generation of this overshoot were investigated using numerical simulations of statistical and dynamical models. Our model comparisons show that inhibitory tagging is a viable mechanism for dynamical planning of scanpaths.

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Download this file (Initial_Fixation_Position.zip)Initial_Fixation_Position.zip[Contains Data of Fixations and Saccades, scripts for Figures 5,6 & 7 of the manuscript and a readme file with further information. ][ ]4181 Kb18/09/2017 11:04
Last Updated on Thursday, 28 September 2017 10:41  

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