III.  Theoretical Accounts of Classical Conditioning

    A.  Contiguity Theory

        1.  Pavlov's Model

        2.  Hull's Model

        3.  Problems

            a.  Response Similarity

            b.  Violations of Temporal Contiguity

            c.  Inhibitory Conditioning

            d.  Contingency Effects

            e.  Differential Learning with the Same Contiguity

            f.  Associating Mental Representations

     B.  The Rescorla-Wagner Theory

        1.  Conditions

        2.  The Delta Rule

        3.  Some Successful Predictions

            a.  Diminishing Returns Curve

            b.  Inhibitory Effects

            c.  Compound Conditioning Effects

              i.  Overshadowing

              ii.  Initial Blocking

        4.  Some Left-Over Problems

            a.  Contiguity Effects

            b.  CS Salience Effects

               i.  Latent Inhibition

               ii.  Learned Irrelevance

               iii.  Excitatory CRs in Blocking

               iv.  Surprisingness

     C.  The Wagner Memory Model

        1.  Two Memory Stores:  STM & LTM

        2.  Attentional Processing versus Automatic Retrieval

        3.  Forming an Episode

        4.  Some Predictions

     D.  A Bit About Comparator Models