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Second order conditioning stage 1 stage 2 cs1us cs2

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Unformatted text preview: timulus-stimulus learning C. Second-order conditioning Stage 1 Stage 2 CS1→US CS2 →CS1 CS2 comes to evoke a CR -  CS2 enters into an association with CS1, which in turn excites a memory of the US as a consequence of stage 1 training. -  Rashotte, Griffin & Sisk (1977): Autoshaping procedure with pigeons. White and blue key-lights as CS1 and CS2. CS1 extinguished after stage 2. Results showed that CR to CS was weakened by this treatment. Supports the above analysis. -  Rizley & Rescorla (1972): Conditioned suppression procedure with rats. Tone and light as CS1 and CS2. They also extinguished CS1 after stage 2. Results showed that CR to CS was NOT weakened by this treatment. Contradicts the above analysis. -  Rescorla (1980): When CS1 and CS2 are similar = CS2-CS1 learning. When CS1 and CS2 are dissimilar = CS1-CR learning. 8 Nature of US representations Two characteristics/properties of US representations: (1)  Specific – Characteristics that make the US unique and recognizable (e.g. its duration, flavor) CS can become asso...
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