A computerized system for learned helplessness experiments

A microcomputer-based system for carrying out learned helplessness experiments is described. The hardware is inexpensive and easily available. The program is written in BASIC and must be executed in the compiled form in order to keep up with real-time events. It contains an algorithm for calculating inter-trial intervals and allows the experimentor to freely select experimental conditions such as duration of shock, number of trials, etc. The task that the rat is required to do to stop the shock is also selectable, thus giving the experimentor the opportunity to maximize behavioral differences between escapable and inescapable rats while these differences are being induced. Experimental data on 12 rats that went through this automated protocol are analyzed and discussed.