Burrhus Frederick Skinner born in March 20 1904 and died August 18 1990. He was a psychologist, author, inventor, advocate for the social reform, and poet. In his time he was the Edgar Pierce professor of psychology at Harvard University in 1958. Until he retired in 1974. He was responsable for the operant conditioning chamber, which innovated his theory named Radical Behaviorism.

Later he founded his own school of experimental psychology named the experimental analysis of behavior, here his work culminated in his final presentation Verbal Behavior. This work has recently been a point of great attention. He discovered and advanced the rate of response as a dependant variable. Also, he invented the cumulative recorder, this was to measure the rate of responding as part of his highly influenctial work on schedule of reinforcement. A survey showed the he was the most influential psychologist of the 20th century, he published 21 books and 180 articles throughout his career. :)

Bibliography: wikipedia.com/wiki/B._F._Skinner