The law of conditioning: "If the occurrence of an operant is followed by presentation of a reinforcing stimulus, the strength is increased" (Skinner, 1938, p 37).
The law of extinction: "If the occurrence of an operant already strengthened through conditioning is not followed by the reinforcing stimulus, the strength is decreased" (Skinner, 1938, p 37).
More laws of operant conditioning is mentioned in the book cited below, including law of compatibility, prepotency, algebraic summation, blending, spatial summation, chaining, induction, inhibition and more. Due to copyright issue, those can not be quoted here.
Brief quotations are reproduced for identification purposes under fair use / fair dealing doctrine
Skinner, B. F. (1938). *The behavior of organisms: An experimental analysis*. Appleton-Century.
[Law of Effect]
Thorndike, E. L. (1898). Animal intelligence: An experimental study of the associative processes in animals. *The Psychological Review: Monograph Supplements*, *2*(4), iā109. <https://doi.org/10.1037/h0092987>
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