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Classical Conditioning Pavlov Classical Conditioning • Terms • Neutral Stimulus: a stimulus that does not initially elicit a response • Unconditioned Stimulus (UCS): an event that elects a cretin predictable response without previous training. • Unconditioned Response (UCR): natural reaction to stimulus • Conditioned Stimulus (CS): a once neutral event that elects a given response after a period of training in which it has been paired with an unconditioned stimulus. • Conditioned Response (CR): The learned reaction to a conditioned stimulus. Classical Conditioning helps animals and humans adapt to the environment. • Acquisition of Classical Conditioning – With each paring of CS and UCS the CR is strengthened over time. – This happens gradually over time. – Timing with the CS and the UCS also influences learning. • Generalization – Pavlov found that similar CS gave the same CR. – Example: Used a circle as the CS, when he would show an oval he would get the same response. • Discrimination: The ability to respond differently to different stimuli • Extinction: The loss of CR to the UCS is not present during the CS. • Spontaneous Recovery reoccurring of CR to the CS, but the CR is not as strong as the first times. • Human Uses: – Little Albert: 11 month old infant • Albert not scared of lab rats • Loud bang is used when he sees them – conditioned over time, now associates rats with loud sound (scared) • Other Uses – Bed Wetting – Taste Aversions: – Snail example