Acquisition curve of Eyeblink CR

1
Acquisition curve of Eyeblink CR
2
Extinction curve
3
Spontaneous Recovery
4
Generalization Gradient

• From Moore, 1972
• Eyeblink conditioning in Rabbits
• CS 1200 Hz Tone UCS mild Shock Hundreds of
  trials
• Generalization test in extinction (no US)

5
Second-Order or Higher-Order Conditioning

• From Rizley Rescorla, 1972
• Phase 1 (8 Trials) CS1 (flashing light) ? UCS
  (shock)
• CR Fear (CER - conditioned emotional response)
• Phase 2 CS2 (1800 Hz tone) ? CS1 (light)

6
Latent Inhibition

• From Hall Minor, 1984
• CER Procedure
• Phase 1 Train thirsty rats to drink from tube
• Phase 2 Separately present Tone during 3
  Sessions Controls had no Tone while in box
• Phase 3 All rats had Tone? Shock pairings
• Test Phase Present Tone while rats were
  drinking from water tube
• Suppression ratio _A_
• AB
• A responses during CS
• B responses prior to CS (same amount of
  time)
• The lower, the more suppression