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Means of Experiment 1 (summation test). The XT groups were tested with Stimulus X in compound with the transfer excitor T. The T groups were tested with the transfer excitor T alone. The GD groups served as controls for generalization decrement. Enhanced conditioned inhibition is evident in the lower responding to the compound XT in group Inflate-XT than in group NoInfl-XT relative to each of their controls, group Inflate-T and group NoInfl-T, respectively.
