  \chapter*{Abstract\markboth{Abstract}{Abstract}}
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Lierhaus \citeyear{Lierhaus} reported results of an eye tracking experiment with rhesus macaques. He concluded there was a twenty percentage increase in the effect of luminance contrast for monkeys in the reported experiment, as compared to \fullcite{ReinagelZador} and a decreased influence of spatial contrast. We conducted an eye-tracking experiment under conditions as close as possible to the monkeys' earlier experiment and compared the results. Influences of luminance and texture contrasts were increased in humans, the effect varying however in different image categories. The most obvious differences we found for eye movements: monkeys tended to look rather down and made faster, wider, and longer lasting saccades as compared to humans. A bootstrap comparison of monkey and human fixation maps showed significant differences between the species. 