Pavlov effect This effect originated from the phenomenon discovered by Ivan Pavlov, a Russian physiologist, when he was studying the digestion experiment of dogs. Specifically, the Pavlov effect describes that one stimulus is connected with another unconditional stimulus with reward or punishment for many times, so that individuals can learn to trigger a conditioned response similar to an unconditional response when presenting a stimulus alone.
This effect applies not only to dogs, but also to humans, and can be used to explain various learning processes, such as the formation of habits and the reaction of fear.