“I see that it is raining” contains the autoclitic tact “I see.” “I see” is controlled by the visual stimulation that is controlling the response “raining.” Stimulation of the visual receptor is a private discriminative stimulus that can come to control such verbal responses as “I see.”
A verbal relationship with the following features:
A non-verbal stimulus
The non-verbal stimulus is some aspect of a primary verbal relationship
The specific features of the controlling relationship (e.g., receptor being stimulated or the intensity or strength of the stimulation; stimulation may include an establishing response)
The form of the response