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2007-11-23 - Psych December Exam Monday December 10th...

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2007-11-22 Psych December Exam Monday, December 10 th , 9am-12pm Pag-Si SSC 3024 Learning – Human Adaptation The many faces of learning Memes – social transmission of human change of behaviour and psychology Habituation and Sensitization Habituation o Decline in response to a stimulus once it has become familiar (repeated  exposure) Ex. City noises o Outcome: attend to novel stimuli more than familiar – adaptive Sensitization or Dishabituation o Sudden or novel stimulation increases response to a familiar stimulus Ex. Hearing a gunshot in city o Outcome: attend to possibility of new circumstances as a result of sudden  change The California Sea Snail – Aplysia Habituates to  water jet After shock –  dishabituates or  sensitizes to  water jet Neural Impact of Learning in Aplysia o Well habituated or sensitized sea  snails display actual physical  changes in size and number of synapses that correspond to relatively  permanent change in behaviour o Habituation – fewer synapses o Sensitization – more synapses
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Classical Conditioning: A Simple but Powerful Learning Mechanism Making links Ivan Pavlov o Studied salivary responses in dogs Is a natural response – no learning involved o Noted that dogs salivated at sounds (Ex. Footsteps, tone) How did the ‘association’ with the tone come about? Basic Principles of  Classical Conditioning o Learn to associate  two stimuli – S-S  paring One  stimulus  elicits a  response  that is  similar to  the one that was originally elicited o Acquisition of the  association Period during  which  association is  being learned First stimulus  elicits a  response  without learning  – prewired
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Second, previously neutral stimulus comes to elicit similar  response Classic Conditional Acquisition Unconditioned Stimulus (UCS) o
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