b&w photograph
Very good condition
Dr. Paul Valiant (in white lab coat) is opening an operant chamber that holds a white lab rat. Similar to photos 03.04.0119 and 03.04.0120. In this experiment rats pressed a lever for a nip of alcohol. Valiant was studying how the rats reacted when they had to work harder and harder, elevating their stress levels, to get the same quantity of alcohol.
Stamped on back: 'Saint Mary's Information Services'. Written in pen: '78-79' (with the 79 encircled). Came in envelope marked 'Psychology 78-79 80-81'.