Learning1 - Learning Learning Adaptive change in behavior...

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1 Learning Learning • Adaptive change in behavior that results from past experiences • Nonassociative Learning – Habituation – Sensitization • Classical Conditioning • Instrumental Learning/Operant Conditioning Habituation • Ability to discontinue response to highly repetitive stimuli • Sokolov (1963) – Delayed Train Sensitization • Increase in responsiveness as result of – repeated application of stimulus – aversive stimulus Habituation and Sensitization Characteristics of Habituation and Sensitization Time course Sensitization is usually temporary -sensitization can last for up to a week but not generally a long-term effect. -with a stronger stimulus, the effects last longer. Short-term habituation : -rapid presentations of a stimulus with a short interval between presentations -results in habituation quickly but see spontaneous recovery -the degree of spontaneous recovery depends on length of rest interval. Habituation can be short-term or long-term, depending on presentation and interval between stimuli.
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2 Long-term habituation : -one stimulus presentation a day -see more long-term effects -see less spontaneous recovery 1. Short-term habituation 2. Spontaneous recovery 3. Long-term habituation 4. Rate of habituation faster for short ISI 5. Rate of habituation faster for weaker stimuli 6. Below-zero habituation 7. Habituation is specific – generalization gradient 8. Dishabituation 9. Habituation of dishabituation Habituation/Dishabituation • GSR measured at onset of either high or low tone – Tone gradually elicits less anxiety •1 5 th trial is the opposite tone low for high group Stimulus specificity Habituation is stimulus-specific -if you change the stimulus, see recovery of the response Sensitization is not highly stimulus-specific -if an animal is aroused, it is usually aroused to a
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This note was uploaded on 10/14/2011 for the course PSYCH 100 taught by Professor X during the Spring '11 term at Fairfield.

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Learning1 - Learning Learning Adaptive change in behavior...

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