When conducting a micro-analysis of the theoretical and functional differences between Edward Thorndike's Connectionism, Ivan Pavlov's Classical Conditioning, and B.F. Skinner's Operant Conditioning in the field of learning, which of the following statements most accurately defines the fundamental working mechanism and the nature of stimulus-response across these three theories?

Understanding Learning Theories

Thorndike's Connectionism and Pavlov's Classical Conditioning are both based on Stimulus-Response (S-R), where Pavlov pairs a conditioned stimulus with an unconditioned stimulus. In contrast, B.F. Skinner's Operant Conditioning is based on the Response-Stimulus (R-S) paradigm, where the organism emits a response voluntarily and its frequency is determined by consequences (reinforcement).

• Thorndike: S-R bond formation through trial and error.
• Pavlov: Association between conditioned and unconditioned stimuli.
• Skinner: Behavior is shaped by its consequences (R-S).