A contemporary of Pavlov and a major competitor, Vladimir Bechterev began the first experimental psychology lab in Russia (at the University of Kazan). Following his graduation, Bechterev studied with Wundt, DeBois-Reymond and Charcot.
Apparently jealous of Pavlov’s success, Bechterev insisted on using his own notation. Instead of Pavlov’s conditioned reflex, Bechterev called it an “associated reflex.” Instead of studying secretions (a very physiological orientation), Bechterev studied motor reflexes.
For Bechterev, behavior was completely explainable within a S-R (stimulus-response) format. Indeed psychology was for him simply “human reflexology.”