B. F. Skinner is responsible for establishing the law of effect.

The law of effect was established by Edward Thorndike, who found that behaviors followed by satisfying outcomes are more likely to be repeated. B. F. Skinner later developed operant conditioning and built on ideas related to reinforcement, but he did not establish the law of effect. Therefore, the statement is false, which is choice B.

AI-written and checked against the verified answer.