Evolution Experiment
Point-light displays that contain no coherent structural information still retain cues as to the facing direction of the walker.
These cues are rendered unavailable however if the display is inverted (Troje & Westhoff, 2006; Chang & Troje, 2008).
In this experiment, we search for the stimulus (display) that, in the absence of coherent form information, carries the most
informative directional cues and a pronounced inversion effect.
On each trial in this experiment, we present a point-light display that is drawn from a test population of displays and we measure the observer's
ability to discriminate its facing direction. Data from observers are subsequently pooled and used to determine the best displays.
The test population is continuously evolved based on the pooled observer responses.
To participate, click here.
Chang, D. H. F. & Troje, N. F. (2008). Perception of animacy and direction from local biological motion signals. Journal of Vision, 8(5):3, 1-10.
Troje, N. F. & Westhoff, C. (2006). The inversion effect in biological motion perception: Evidence for a "life detector"? Current Biology, 16, 821-824.
