Behavioral history research includes studies that (a) permit assessmen
t of a prior experimental condition on a subsequent one, (b) show eith
er short-lived or permanent effects, and (c) produce effects that are
observable in ongoing behavior or that may be unobservable until speci
al test conditions are introduced. We review experiments within both t
he conventional experimental analysis of behavior and behavioral pharm
acology in order to identify commonalities and differences in the outc
omes of conceptually similar experiments. We suggest that a deeper und
erstanding of the necessary and sufficient conditions for producing hi
story effects will emerge from these complementary research efforts.