Stimulus objects are to be emphasized as much as responses. In Kantor's notation, there is a bidirectional arrow between S and R to indicate the reciprocal exchange between stimulating environment and behaving organism. In physics, there is a simple exchange of energy between two entities. In biology, one entity receives stimulation from another in a way that entails more than just a commutative exchange of energy. Psychological events depend upon a preceding history of interaction, called the reactional biography.
Interbehavioral events involve the whole organism and are inappropriately fractionated.
Sometimes responses may be implicit, orientational phenomena, but they are nevertheless of behavioral ilk. Attention and perceptual interactions are not psychic processes but rather are continuous with other forms of interbehavior, in that they originate via direct contact with things and promote adjustment with respect to the world of stimulating objects. Language too is a behavioral phenomenon. Matters of phonology, morphology, syntax, and semantics are behavioral matters. Furthermore, language and logic are clearly linked as behavioral phenomena.