Fig. 1.

Task and sample stimuli. (A) Task structure and time-course. One target object either disappeared or changed its orientation between two alternating frames. These frames were separated by a blank frame. Note that the sizes of the stimuli are not to scale. Sample stimuli showing changes of (B) an animal, (C) artifact, (D) person, (E) plant and (F) head direction. The changes are labeled by a red box. Low-level saliency and eccentricity of the changes did not differ between categories, while plants were significantly larger in area, favoring easier detection.