Conditioning

• Unconditioned Stimulus (US) (=food)
• Another feature or cue (bell), becomes Conditioned Stimulus (CS)
• A response that indicates association (salvation)
• The unconditioned stimulus is what we want to predict, our outcome
• Conditioned Stimuli or cues are the Features we are learning to use to predict the outcome (US)
• Current Vector V t ij changes with each learning instance
• $V_{ij}^{t+1}=V_{ij}^t+\Delta V_{ij}^t$
• $\Delta V_{ij}^t=(1-{\text{connection weight}}_j^t)$
• ▶ V = association strength ▶ i = current input (cue) ▶ j = current output (outcome) ▶ ∆ V : Change in association strength
• Pavlov discovered evidence of positive associations
• Associations increase in strength whenever a feature and a cue occur together