Transposition with auditory stimuli following successive discrimination training

An investigation was performed to examine whether responding to auditory stimuli would be to relative, or to absolute properties of stimuli. The design was a replication of previous research, with additional control of a possible stimulus intensity effect. Rats were trained to respond to one of two tones differing in intensity, and later tested to determine whether transposition occurred. Transposition was reliable (p <.05) for each subject, both when the correct transpositional stimulus was the more intense and when it was the less intense of two stimuli.