Columbia University [David Anderson, Columbia psychology lecturer, experiments with a rat to teach it to pull a chain and get food.]
Columbia University [David Anderson, Columbia psychology lecturer, tries a simple experiment with rat to teach it to pull a chain and get food.]
Columbia University [David Anderson, Columbia psychology lecturer, tries a simple experiment with a rat to teach it to pull a chain and get food.]
Columbia University [Professor teaching a class.]
Columbia University [Professor teaching in a lecture hall.]
Columbia University [Medical students attending a lecture.]