Rothkegel et al. 8 over the two saliency models and the human fixation map), the corresponding image was classified as having left or right focus. After application of this criterion, we retained 23 images with focus close to the center (balanced images), 12 images with left focus, and 13 images with right focus among the set of object-based scenes $^{1}$. For the presentation during the experiment, images were converted to a size of 1200 × 960 pixels and displayed in the center of the screen with gray borders extending 32 pixels to the top/bottom and 40 pixels to the left/right of the image. The image covered 31 ◦ of visual angle in the horizontal and 25 ◦ in the vertical dimension. Participants . We recorded eye movements from 28 human participants with normal or corrected-to-normal vision. The group of participants consisted of 20 female and 8 male observers aged between 19 and 33 years; all were recruited from the University of Pots- dam. Participants received credit points or a monetary compensation of 8 Euro for their participation. The work was carried out in accordance with the Declaration of Helsinki. Informed consent was obtained for experimentation by all participants. Procedure . Participants were instructed to position their heads on a chin rest in front of a computer screen at a viewing distance of 70 cm. Eye movements were recorded binocularly using an Eyelink 1000 video-based eye tracking system (SR Research, Os- goode/ON, Canada) with a sampling rate of 1000 Hz. Trials began with a black fixation cross presented on a grey background at the vertical meridian 5.6 ◦ away from the left or right border of the monitor. After successful binocular fixation in a quadratic area with a length of 2.2 ◦ an image appeared while the fixation cross remained present for another second. Participants were instructed to keep their eyes on the fixation cross until $^{1}$We originally chose the natural scenes to contain 16 images in each category. Because our subjective categorization did not match the objective criterion for 7 of the images, an unequal number of images in each category remained for further analysis.