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Pavlovian blocking procedures involving a neutral stimulus (NS), conditioned stimulus (CS) and unconditioned stimulus (US). In Phase 1, the NS→US sequence at C/T = 10 establishes the CS function (C refers to the inter-US interval and T to the CS→US interval). In Phase 2, procedures are unchanged with the exception that an NS is presented simultaneously with the functional CS. In the test phase, the NS is presented alone to evaluate if it will evoke a conditioned response.
