This text is best avoided if you are looking for something that will help you understand Skinner, Behaviorism, and Walden II better. Within the first ten pages of the text, "negative reinforcement" is defined (multiple times) as being "essentially a form of punishment" when this is completely incorrect, not even close to being right. Negative reinforcement involves rewarding a behavior by removing an aversive stimulus, basically the opposite of what punishment is.I stopped reading after the tenth page or so because this text is just so clearly riddled with misinformation that I felt finishing it would do me more harm than good. I don't know if the Spark Notes of this text has the same errors, but from what I have seen from skimming it, it is a much more reliable resource than this would be.Do NOT buy the Cliffs Notes on Walden II, its author is by no means authoritative on the material covered, and had no business writing a study guide on it.