A failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.

It seeks to understand behavior as a function of environmental histories of reinforcing consequences. The concept of the verbal summator sparked interest within the scientific community and eventually led to other new tests: the “tautophone test the auditory apperception test and the Azzageddi test” and has inspired many others. Self-management refers to how students think- how they attend to the environment with the view of responding appropriately to stimuli.

The box had a lever and a food tray and a hungry rat could get food delivered to the tray pressing the lever. F. He invented the cumulative recorder to measure rate of responding as part of his highly influential work on schedules of reinforcement.