Hearst, E. (1999). After the puzzle boxes: Thorndike in the 20th century. Journal of the Experimental Analysis of Behavior, 72, 441-446.

From the beginning of this century, following the publication of his dissertation, Thorndike made many significant contributions to psychology, some related to animal and human learning and others to various areas of educational psychology. This paper concentrates on the former and mentions some of the latter, in the context of personal and professional aspects of his life.

Key words: E. L. Thorndike, connectionism, law of effect, law of exercise, reward versus punishment, spread of effect, learning without awareness