fairly stereotypic behavior which follows the introduction of a stimulant. It varies from straight-forward responder practice where the potential of its happening is afflicted by the lag between stimulant displays. A strong illustration is schedule-induced polydipsia, where high amounts of consumption of water takes place whenever tiny parts of food are introduced erratically.
ADJUNCTIVE BEHAVIOR: "Pica is an example of adjunctive behavior- a craving for non-food substances."
