Cumulative Record: Definitive Edition (1999). Chapter 7: Are Theories of Learning Necessary. Quote 12 Post author:B. F. Skinner Foundation Post published:May 28, 2021 Post category:Skinner's Quote of the Day Progress in a scientific field usually waits upon the discovery of a satisfactory dependent variable. Until such a variable has been discovered, we resort to theory. (p. 75) You Might Also Like Cumulative Record. Chapter 17: Contingency Management in the Classroom. Quote 6 February 1, 2023 Science and Human Behavior, Chapter 7: Operant Discrimination, Quote 7 April 21, 2016 Science and Human Behavior, Chapter 20: Personal Control, Quote 1 December 7, 2016