Classical conditioning

1
Classical conditioning

• S-S vs S-R theories

2
Classical conditioning I

• S-S vs . S-R theories What is associated?
• Response prevention
• Learning phase CS US ---gt no UR
• Testing phase CS ---gt CR
• US devaluation
• Learning phase CSUS ---gt CR/UR
• Next, devalue the US through satiation
• Test phase CS ---gt lessened CR

3
Classical conditioning I

• S-S or S-R theories, continued
• Sensory preconditioning
• Preconditioning phase CS1 CS2 ---gt OR
• Conditioning phase CS1 US ---gt UR
• Test phase CS1 ---gt CR.
• CS2 ---gt ?
• Response-prevention, US devaluation, and sensory
  preconditioning support S - S

4
S - S or S - R ?

• Second-order conditioning
• Start with standard pairing of CS1 and US
• CS1 ---gt CR
• Then pair CS1 CS2
• Test CS2 ---gt CR
• Then devalue US, or extinguish CS1
• Test CS2 ---gt CR
• Whether CS connects to US or CR depends on which
  is more salient

5
A crucial test

• Set up a second-order conditioning experiment
• CS1(light) US1 (food) ---gt UR1(salivation)
• Test CS1 (light) ---gt CR1 (salivation)
• CS2(buzzer) CS1(light) ---gt CR1(salivation)
• Test CS2 (buzzer) ---gt CR1 (salivation)
• Then CS1 (light) US2(shock) ---gt UR2(leg lift)
• Test CS2 ---gt

CR1
6
Changing representations