Radical behaviorism championed by BF Skinner is fundamentally distinguished from methodological behaviorism by its treatment of private events Methodological behaviorism limits its scope to publicly observable events and behaviors often excluding internal states from scientific analysis In contrast radical behaviorism posits that private events such as thoughts feelings and sensations are indeed behaviors governed by the same natural laws and principles of learning eg reinforcement punishment stimulus control as public behaviors even if they are not directly observable by others While acknowledging the difficulty in observing and measuring them radical behaviorism does not dismiss them as nonbehavioral phenomena Options A B and D are incorrect because A Operant conditioning predates radical behaviorisms full development and wasnt its sole distinguishing factor from methodological behaviorism B This describes methodological behaviorism not radical behaviorism D This describes early forms of behaviorism like Watsons which focused on classical conditioning whereas Skinners radical behaviorism is more associated with operant conditioning