In transfer from shock escape to appetitively motivated training in a straight runway, 64 male hooded rats were ·given various pretreatments, or none, prior to transfer. With appropriate controls, running was motivated by high-intensity noise (120 dB) or shock (1 mA), by low-intensity shock (.2 mAl, or by a second-order aversive excitatory stimulus prior to the elimination of those stimulus conditions and the initiation of food reinforcement. In general, all of the pretreatments produced extended suppression in the transfer condition. Controls for latent inhibition indicated none was present. High-intensity shock reduced eating on initial food reinforcement trials, but the other aversive conditions did not. The results were interpreted as possible consequences of stimulus-directive effects.There is now a substantial amount of reasonably consistent evidence that transfer from aversive to appetitive training in the runway produces suppressed responding in the transfer situation in comparison with a procedure in which the prior aversive training is not given (Babb, 1963 ; Babb & Leask, 1969;Mellgren, Haddad, Dyck, & Eckert, 1976 ; Nation, Wrather, Mellgren, & Spivey, 1980;Stoffer & Babb, 1976). One important theoretical question is whether such effects are attributable to some form of response competition or to some more central incompatibility between appetitive and aversive stimulation (Dickinson & Pearce, 1977). While the molar response of running to the goalbox is the same for aversive and appetitive conditions, the molecular components could be different, and possibly competitive (Babb , Bulgatz, & Matthews, 1969) .One way to test for the effects of response competition would be to use an aversive stimulus other than shock , such as loud noise, on the presumption that noise would elicit kinds of component responding that could be different from those elicited by the application of shock to the feet of the animals. Another way of testing for response compatibility would be to use secondorder conditioning, on the presumption that any such conditioning produced by an "off-baseline" conditioning procedure and tested in the runway should be reasonably divorced from first-order response-eliciting effects. If suppressive effects were obtained from the second-order conditioning procedure , it would emphasize the generality of whatever process underlies the production of suppression, and it would also emphasize This report is based on a dissertation submitted to the University of Montana by Marvin G. Bulgatz in partial fulfillment of requirements for the PhD degree.the ability of second-order conditioning to produce effects that are transferable to instrumental responding in the runway . Accordingly, a noise CS was paired with shock, presented randomly with shock, or given without shock in a behavior-restricting apparatus, and then subjects were transferred to noise alone in the runway. To control for possible latent inhibition effects (Lubow, 1973), other animals were presented high-intensity noise, high-intensity s...