Abstract
Nonaversive unconditional stimuli (USs) are seldom used in human classic conditioning of autonomic responses. One major objection to their use is that they produce deficits in electrodermal (ED) second- and third-interval response conditioning. However, a nonaversive reaction time (RT) task that includes feedback of success has been shown to be an effective US while avoiding this disadvantage (Lipp and Vaitl 1988). The present study compared this new RT task (RT-new) with a traditional RT task (RT-old) and with a standard aversive US (shock) in differential classic conditioning of ED, heart rate (HR), and digital pulse volume (DPV) responses. Eight-second-delay differential conditioning was applied in three groups of 12 subjects each. Simple geometric features (square, cross) displayed on a television screen served as conditional stimuli (CS+ and CS−). In acquisition, there were no statistically significant differences among the groups; differential conditioning did occur in HR, first- and second-interval ED responses, and first-interval DPV responses. Separate analyses within each group, however, revealed that there was no second-interval ED conditioning in the RT-old group. During extinction, neither DPV nor second-interval ED conditioning could be obtained, whereas HR and first-interval ED conditioning occurred in each group. In third-interval omission ED responses, RT-old and shock groups exhibited extinction, while response differentiation was maintained in the RT-new group throughout extinction. The RT task including feedback proved to be as reliable a US as a standard aversive US, whereas application of a traditional RT task again yielded some weaknesses in second-interval ED conditioning.
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References
Baer, P. E., and Fuhrer, M. J. (1969) Cognitive factors in differential conditioning of the GSR: Use of a reaction time task as the UCS with normals and schizophrenics.Journal of Abnormal Psychology, 74, 544–552.
Fredrikson, M., and Öhman, A. (1979) Cardiovascular and electrodermal responses conditioned to fear-relevant stimuli.Psychophysiology, 16, 1–7.
Fuhrer, M. J., and Baer, P. E. (1970) Preparatory instructions in the differential conditioning of the galvanic skin response of schizophrenics and normals.Journal of Abnormal Psychology, 76, 482–484.
Furedy, J. J. (1968) Human orienting reaction as a function of electrodermalversus plethysmographic response modes and singleversus alternating stimulus series.Journal of Experimental Psychology, 77, 70–78.
Greenhouse, S. W., and Geisser, S. (1959) On methods in the analysis of profile data.Psychometrica, 24, 95–112.
Hamm, A. O., Vaitl, D., and Lang, P. J. (1989) Fear conditioning and belongingness: A double-dissociation analysis.Journal of Abnormal Psychology, 98, 395–406.
Kimmel, H. D., King, J., Huddy, J. J., and Gardner K. A. (1980) A mutual inductance shocker.Behavior Research Methods and Instrumentation, 12, 605–606.
Kirk, E. R. (1968)Experimental Design: Procedures for the Behavioral Sciences. Belmont, California: Brooks/Cole.
Lipp, O. V., and Vaitl, D. (1988) Reaction time task as unconditional stimulus: On conditioning skin conductance responses and heart rate, using a nonaversive unconditional stimulus.Pavlovian Journal of Biological Science, 23, 165–172.
Lykken, D. T., and Venables, P. H. (1971) Direct measurement of skin conductance: A proposal for standardization.Psychophysiology, 8, 656–672.
McKinney, M. E., Miner, M. H., Rüddel, H., McIlvian, H. E., Witte, H., Buell, J. C., Elliot, R. S., and Grant, L. B. (1985) The standardized mental stress test protocol: Test-retest reliability and comparison with ambulatory blood pressure monitoring.Psychophysiology, 22, 453–463.
McNally, R. J. (1987) Preparedness and phobias: A review.Psychological Bulletin, 101, 283–303.
Öhman, A. (1983) The orienting response during Pavlovian conditioning. In D. A. T. Siddle (Ed.),Orienting and Habituation: Perspectives in Human Research. Chichester: John Wiley & Sons, pp. 315–371.
Öhman, A., Fredrikson, M., Hugdahl, K., and Rimmö, P. A. (1976) The premise of equipotentiality in human classical conditioning: Conditioned electrodermal responses to potentially phobic stimuli.Journal of Experimental Psychology: General, 105, 313–337.
Öhman, A., Fredrikson, M., and Hugdahl, K. (1978) Orienting and defensive responding in the electrodermal system: Palmar-dorsal differences and recovery rate during conditioning to potentially phobic stimuli.Psychophysiology, 15, 93–101.
Siddle, D. A. T., Remington, B., and Churchill, M. (1985) Effects of conditioned stimulus preexposure on human electrodermal conditioning.Biological Psychology, 20, 113–127.
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Lipp, O.V., Vaitl, D. Reaction time task as unconditional stimulus. Pav. J. Biol. Sci. 25, 77–83 (1990). https://doi.org/10.1007/BF02964606
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DOI: https://doi.org/10.1007/BF02964606