Recent Issues. Chapter 12: The Behavior of Organisms at Fifty. Quote 15 Post author:B. F. Skinner Foundation Post published:April 19, 2019 Post category:Skinner's Quote of the Day “When a response was reinforced only in the presence of the light as an S Dee, the rat responded slowly in its absence (which, unfortunately, I called S Delta, hard to print) but responded immediately when the light came on.” (p. 127) You Might Also Like Cumulative Record. Chapter 52: Can Psychology Be a Science of Mind? Quote 23 August 7, 2024 Cumulative Record. Chapter 13: Teaching Machines. Quote 18 November 11, 2022 Science and Human Behavior, Chapter 8: The Controlling Environment, Quote 4 May 19, 2016