Situational relevance: Context as a factor in serial overshadowing of taste aversion learning

Abstract

In a serial overshadowing procedure, a target stimulus, A, is followed after an interval by a potentially interfering stimulus, B, and this is then followed by an unconditioned stimulus (US). An untested proposal from over four decades ago was that the degree to which B overshadows conditioning of A depends on whether or not the two events take place in the same context. To test this, two experiments used a 1-trial long-delay conditioned taste aversion (CTA) procedure: sucrose served as the target taste (A) and dilute hydrochloric acid (HCl) as the overshadowing taste (B), with lithium chloride injection providing the US. In Experiment 1, these tastes were novel: weaker overshadowing by HCl of an aversion to sucrose was found when the two tastes were presented in different contexts. Experiment 2 tested whether the effect of pre-exposure to HCl, thereby rendering it less effective in overshadowing a sucrose aversion, was also context dependent. In the conditioning session, rats again received either context-same or context-different presentations of sucrose and HCl. However, for some rats, HCl was pre-exposed in the same context to which it was later presented during conditioning (Consistent), while others were pre-exposed to HCl in a different context to the one in which it was presented during conditioning (Inconsistent). The Inconsistent group produced greater overshadowing than the Consistent group and thus confirmed that the latent inhibition effect was also context dependent. This study confirms the concept of situational relevance.

Keywords

Conditioned taste aversion long-delay learning serial overshadowing context dependency latent inhibition

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References

Bernstein

I. L.

Webster

M. M.

Bernstein

I. D.

(1982). Food aversions in children receiving chemotherapy for cancer. Cancer, 50, 2961–2963.

Bouton

M. E.

(1993). Context, time, and memory retrieval in the interference paradigms of Pavlovian learning. Psychological Bulletin, 114, 80–99.

Capaldi

E. J.

(1971). Memory and learning: A sequential viewpoint. In Honig

W. K.

James

P. H. R.

(Eds.), Animal memory (pp. 111–154). New York, NY: Academic Press.

Hall

Channell

(1986). Context specificity of latent inhibition in taste aversion learning. Quarterly Journal of Experimental Psychology, B, 38, 121–139.

Hall

Rodriguez

(2010). Associative and non-associative processes in latent inhibition: An elaboration of the Pearce-Hall model. In Lubow

R. E.

Weiner

(Eds.), Latent inhibition: Data, theories, and applications to schizophrenia (pp. 114–136). New York, NY: Cambridge University Press.

Hilgard

E. R.

Marquis

D. G.

(1940). Conditioning and learning. New York, NY: Appleton-Century-Crofts.

Holmes

N. M.

Westbrook

R. F.

(2017). A dangerous context changes the way that rats learn about and discriminate between innocuous events in sensory preconditioning. Learning and Memory, 24, 440–448.

Hull

C. L.

(1943). Principles of behaviour. New York, NY: Appleton-Century-Crofts.

Kamin

L. J.

(1968). ‘Attention-like’ processes in classical conditioning. In Jones

M. R.

(Ed.), Miami symposium on the prediction of behaviour, 1967: Aversive stimulation (pp. 9–32). Coral Gables, FL: University of Miami Press.

10.

Kamin

L. J.

(1969). Predictability, surprise, attention and conditioning. In Campbell

B. A.

Church

R. M.

(Eds.), Punishment and aversive behavior (pp. 279–296). New York, NY: Appleton-Century-Crofts.

11.

Kimble

G. A.

(1961). Conditioning and learning. New York, NY: Appleton-Century-Crofts.

12.

Kwok

D. W. S.

(2016). Serial overshadowing in long-delay taste aversion learning (Doctoral thesis). The University of Sydney, Australia. Retrieved from http://hdl.handle.net/2123/15384

13.

Kwok

D. W. S.

Boakes

R. A.

(2015a). Proximal, but not distal, pre-exposure reduces serial overshadowing in one-trial taste aversion learning. Behavioural Processes, 118, 111–114.

14.

Kwok

D. W. S.

Boakes

R. A.

(2015b). Taste aversion learning despite long delays: How best explained? International Journal of Comparative Psychology, 28, 1–15.

15.

Kwok

D. W. S.

Harris

J. A.

Boakes

R. A.

(2016). Timing of interfering events in one-trial serial overshadowing of a taste aversion. Learning & Behavior, 45, 124–134.

16.

Lawrence

D. H.

(1949). Acquired distinctiveness of cues: I. Transfer between discriminations on the basis of familiarity with the stimulus. Journal of Experimental Psychology, 39, 770–784.

17.

Lawrence

D. H.

(1950). Acquired distinctiveness of cues: II. Selective association in a constant stimulus situation. Journal of Experimental Psychology, 40, 175–188.

18.

Lett

B. T.

(1975). Long delay learning in the T-maze. Learning and Motivation, 6, 80–90.

19.

Lieberman

D. A.

McIntosh

D. C.

Thomas

G. V.

(1979). Learning when reward is delayed: A marking hypothesis. Journal of Experimental Psychology: Animal Behavior Processes, 5, 224–242.

20.

Lovejoy

E. P.

Russell

D. G.

(1967). Suppression of learning about a hard cue by the presence of an easy cue. Psychonomic Science, 8, 365–366.

21.

Mackintosh

N. J.

(1965). Selective attention in animal discrimination learning. Psychological Bulletin, 64, 124–150.

22.

Mackintosh

N. J.

(1971). An analysis of overshadowing and blocking. Quarterly Journal of Experimental Psychology, 23, 118–125.

23.

Mackintosh

N. J.

Reese

(1979). One-trial overshadowing. Quarterly Journal of Experimental Psychology, 31, 519–526.

24.

Miles

C. G.

(1969). A demonstration of overshadowing in operant conditioning. Psychonomic Science, 16, 139–140.

25.

Miles

C. G.

Mackintosh

N. J.

Westbrook

R. F.

(1970). Redistributing control between the elements of a compound stimulus. Quarterly Journal of Experimental Psychology, 22, 478–483.

26.

Pavlov

I. P.

(1927). Conditioned reflexes. Oxford, UK: Oxford University Press.

27.

Quinn

V. F.

Colagiuri

(2015). Placebo interventions for nausea: A systematic review. Annals of Behavioral Medicine, 49, 449–462.

28.

Rescorla

R. A.

Wagner

A. R.

(1972). A theory of Pavlovian conditioning: Variations in the effectiveness of reinforcement and nonreinforcement. In Black

A. H.

Prokasy

W. F.

(Eds.), Classical conditioning II: Current research and theories (pp. 64–99). New York, NY: Appleton Century-Crofts.

29.

Revusky

(1971). The role of interference in association over a delay. In Honig

W. K.

James

P. H. R.

(Eds.), Animal memory (pp. 155–213). New York, NY: Academic Press.

30.

Revusky

(1977). Learning as a general process with an emphasis on data from feeding experiments. In Milgram

N. W.

Krames

Alloway

T. M.

(Eds.), Food aversion learning (pp. 1–51). New York, NY: Plenum Press.

31.

Roberts

W. H.

(1976). Failure to replicate visual discrimination learning with a 1-min delay of reward. Learning and Motivation, 7, 313–325.

32.

Sutherland

N. S.

Andelman

(1967). Learning with one and two cues. Psychonomic Science, 7, 107–108.

33.

Wagner

A. R.

(1971). Elementary associations. In Kendler

H. H.

Spence

J. T.

(Eds.), Essays in neobehaviorism: A memorial volume to Kenneth W. Spence (pp. 187–213). New York, NY: Appleton-Century-Crofts.

34.

Wagner

A. R.

(1976). Priming in STM: An information-processing mechanism for self-generated or retrieval-generated depression in performance. In Tighe

T. J.

Leaton

R. N.

(Eds.), Habituation: Perspectives from child development, animal behaviour, and neurophysiology (pp. 95–128). Hillsdale, NJ: Erlbaum.