Influence of initial fixation position 25 While the analysis in Figure 7 is based on averaging over experimental conditions, Figure 8 shows the MHD for each of the different conditions for experimental data and model simulations. Across all conditions, the Gaussian-weighted density map is too slow in approaching the image side opposite to the starting position, while random sampling from the density map gives an acceptable fit to some experimental conditions. Initially the saccadic momentum model equals the experimental data curve, because they are the same for the first three fixations. Afterwards it moves too slowly away from the starting position and does not show an overshoot. While overshoots in the SceneWalk model are often too strong compared to experimental data, inhibitory tagging as implemented in our model is a viable computational mechanism to explain the existence of an overshoot of eye position to image side opposite to the starting position. Quantitave evaluation is shown in Fig.9. The saccadic momentum model keeps the first 3 fixations from the experimental data, which relates to a mean fixation duration of 1360 ms. Therefore, we investigated the time window from 1.36 s to 5 s (no systematic effects can be seen after 5 s). Across all models, the orignial SceneWalk model or the SceneWalk model with the adjusted inhibition strength is closest to the experimental data. Thus, there is a clear trend that it outperforms the saccadic momentum model and the statistical models with respect to the mean horizontal distance. In an eye tracking experiment we investigated the influence of experimentally manipulated starting positions on scanpath behavior in human observers. Most important effects were observed in the temporal evolution of the mean horizontal distance (MHD) to the starting position. First, we found unexpectedly long transients in mean eye position. It took up to 5 seconds for gaze of human observers to reach the final average fixation position. This Discussion