Chapter 4 Operant Conditioning o 4.3.3 Major Theoretical Notions o x radical behaviorism: rejected the mentalistic ideas such as drive, motivation, and purpose because they refer to private, mental experience and represented a return to nonscientific psv. The observable and measurable aspects of the environment, of an organism's behavior, and of the consequences of that behavior were the critical material for scientific scrutiny.Chapter 4 Operant Conditioning ⚫ 4.3.3 Major Theoretical Notions ⚫ ＊radical behaviorism:rejected the mentalistic ideas such as drive, motivation, and purpose because they refer to private,mental experience and represented a return to nonscientific psy. The observable and measurable aspects of the environment, of an organism’s behavior, and of the consequences of that behavior were the critical material for scientific scrutiny