Abstract / Description of output
“Natural” gaze is typically measured by tracking eye positions during scene presentation in laboratory settings. How informative are such investigations for real-world conditions? Using a mobile eyetracking setup (“EyeSeeCam”), we measure gaze during free exploration of various in- and outdoor environments, while simultaneously recording head-centred videos. Here, we replay these videos in a laboratory setup. Half of the laboratory observers view the movies continuously, half as sequences of static 1-second frames. We find a bias of eye position to the stimulus centre, which is strongest in the 1 s frame replay condition. As a consequence, interobserver consistency is highest in this condition, though not fully explained by spatial bias alone. This leaves room for image specific bottom-up models to predict gaze beyond generic biases. Indeed, the “saliency map” predicts eye position in all conditions, and best for continuous replay. Continuous replay predicts real-world gaze better than 1 s frame replay does. In conclusion, experiments and models benefit from preserving the spatial statistics and temporal continuity of natural stimuli to improve their validity for real-world gaze behaviour.
Original language | English |
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Pages (from-to) | 1132-1158 |
Journal | Visual Cognition |
Volume | 17 |
Issue number | 6-7 |
DOIs | |
Publication status | Published - 1 Aug 2009 |
Keywords / Materials (for Non-textual outputs)
- human
- eye movements
- real world
- natural stimuli
- attention