File:Spatial-Probability-Dynamically-Modulates-Visual-Target-Detection-in-Chickens-pone.0064136.s010.ogv

English: A chicken performing a multiple-alternative task. A chicken performs a multiple alternative task involving the detection of a briefly-flashed target. The bird pecks on a zeroing cross to initiate the trial and, immediately afterward, a target (small dot) is briefly flashed (50 ms) on the screen. In the first trial, the target appears in the upper right quadrant, and in the second trial, in the lower left quadrant of the bird’s visual field. In these trials, the bird is rewarded for pecking at the location of the target (Go response). In the third trial, no dot is presented, and the bird is rewarded for pecking once more on the zeroing cross (NoGo response). The screen turns bright to signal the end of each trial, and to provide sufficient illumination for the bird to feed.