A science of behavior contributes to a useful technology of behavior change, to the extent that it discovers functional relations with across individuals.

Generality.

Explanation:

Generality is a term in behavioral psychology, that describes the functional relationships attained in one situation, which is used to predict the obtained relationship in a current or different situation.

In other words, it is the belief that the outcomes of experiments involving schedules of reinforcement, administered on non-human subjects can be generalized and be applicable to humans.

Hence, a science of behavior contributes to a useful technology of behavior change, to the extent that it discovers functional relations with GENERALITY across individuals.

answer; a cost benefit analysis;