This video shows a mouse engaged in rewarded behavior in the laboratory. It shows about 30 s of footage. During this time the mouse engages in 5 trials (4 correct ones and one mistake). 

Trials are started by going to the central port (black square). Then a grating stimulus appears to the left or to the right. The mouse has to go to the appropriate port to receive a fluid reward. 

This work was presented at the 2010 meeting of the Society for Neuroscience: Zaharia AD, Busse L, Katzner S, Carandini M (2010) Visual psychometric functions in the mouse. Program No. 674.10. In: Online Abstract Viewer. Washington, DC: Society for Neuroscience.

A full version is in press: Busse L, Ayaz A, Dhruv NT, Katzner S, Saleem AB, Schölvinck ML, Zaharia AD, Carandini M "The detection of visual contrast in the behaving mouse". J Neurosci (2011).