Historically, anxiety has been a dominant subject in mainstream psycho
logy but an incidental or even insignificant one in behavior analysis.
We discuss several reasons for this discrepancy. We follow with a beh
avior-analytic conceptualization of anxiety that could just as easily
be applied to emotion in general. Its primary points are (a) that lang
uage-able humans have an extraordinary capacity to derive relations be
tween events and that it is a simple matter to show that neutral stimu
li can acquire discriminative functions indirectly with no direct trai
ning; (b) that private events can readily acquire discriminative funct
ions; (c) that anxiety disorders seem to occur with little apparent di
rect learning or that the amount of direct learning is extraordinarily
out of proportion with the amount of responding; and (d) that the pri
mary function of anxious behavior is experiential avoidance. We conclu
de that the most interesting aspects of anxiety disorders may occur as
a function of derived rather than direct relations between public eve
nts and overt and private responses with avoidance functions. Implicit
in this conclusion and explicit in the paper is the assertion that an
xiety is a suitable subject for behavior-analytic study.