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Psychopharmacology

, Volume 157, Issue 2, pp 172–179 | Cite as

No evidence for latent learning of liking for flavours conditioned by caffeine

  • Martin R. Yeomans
  • Tamzin Ripley
  • Michelle D. Lee
  • Paula J. Durlach
Original Investigation

Abstract.

Rationale: The ability of caffeine to condition liking for flavours depends on the caffeine deprivation status of subjects; however, it is not known if a latent liking for a flavour can be acquired in an undeprived state, which subsequently emerges when consumers are caffeine deprived. Objectives: To determine if exposure of undeprived caffeine consumers to a novel drink containing caffeine leads to increased liking for this drink when they are subsequently tested when caffeine-deprived. Methods: In a double-blind placebo controlled study, four groups of 13 moderate caffeine consumers evaluated a novel flavoured drink on 5 days. The test group consumed this drink with 100 mg caffeine when undeprived on days 1-4, and in a deprived state on day 5. Three control groups had the same conditions on all 5 days, with an undeprived group receiving the caffeinated drink, and two deprived groups receiving the drink with caffeine or placebo. Results: The pleasantness of the drink did not change over the 4 training days in the test group, and did not alter when this group was tested when caffeine-deprived. At no stage did these ratings differ between the test and undeprived control groups. Pleasantness increased significantly over the 5 days in the deprived group who received caffeine, and decreased in the deprived group who received placebo. Conclusions: These results suggest that repeated pairing of a novel flavour with the effects of caffeine in subjects who are not caffeine deprived does not lead to an emergent liking for that flavour when subsequently tested caffeine-deprived. However, the pleasantness of the same caffeinated drink increased if it was consumed when caffeine deprived.

Caffeine Flavour-conditioning Deprivation Latent learning 

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Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • Martin R. Yeomans
    • 1
  • Tamzin Ripley
    • 1
  • Michelle D. Lee
    • 1
  • Paula J. Durlach
    • 2
  1. 1.Experimental Psychology, University of Sussex, Brighton BN1 9QG, UK
  2. 2.Unilever Research, Colworth House, Bedford, UK

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