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  1. The search for convincing experimental tests of conditioned drug effects.Jaylan Sheila Turkkan - 1991 - Behavioral and Brain Sciences 14 (1):201-204.
  • Pavlovian conditioning and death from apparent overdose of medically prescribed morphine: A case report.Shepard Siegel & Delbert W. Ellsworth - 1986 - Bulletin of the Psychonomic Society 24 (4):278-280.
  • The placebo effect as a conditioned response: Failures of the “litmus test”.Irving Kirsch - 1991 - Behavioral and Brain Sciences 14 (1):200-201.
  • Opponent processes in classical conditioning: The jury is still out.Andrew J. Goudie - 1991 - Behavioral and Brain Sciences 14 (1):199-200.