The dual process theory of habituation was studied by Thompson and his colleagues in which spinal reflex was studied. They studied the overt behaviors and the nervous system reactions. As this study continued to go on the organism was not being habituated to the repeated stimulation which turned out to be sensitization. In the study of spinal reflex, it is said that there are 2 types of neurons that react to stimuli. One of the neurons labeled as type H neuron, a neuron located on the reflex arc in which neurons are transmitting information to the spinal neurons, and neurons from the spinal cord and motor neurons transmit information to the muscles. The other type of neurons that reacts to stimuli are labeled as type S, is the stimulus response
