C&L3

C&L3 - ConditioningandLearning...

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Conditioning and Learning Elicited Behavior, Habituation, and  Sensitization January 24, 2012 © John M. Ackroff 2012
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© John M. Ackroff 2012  How flexible is behavior? Nativism vs. empiricism Nativism seems closer to being correct  – there are limits to the response to a  given stimulus and to what we can do
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© John M. Ackroff 2012  Reflexes and the Reflex  Arc Eliciting stimulus stimulates afferent (sensory) neuron Interneuron also sends information to the brain  Corresponding response controlled by efferent  (motor) neuron.
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© John M. Ackroff 2012  Types of reflexes simple  Knee jerk, eye blink  complex  Animal limb response, baby nursing  competing     Baby nursing (respiratory occlusion) 
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© John M. Ackroff 2012  Modal Action Patterns Originally called Fixed Action Patterns,  but there is some variability   Response is a function of the  environment  Male stickleback doesn’t court if he hasn’t  built a nest  Stimulus (female stickleback) is the same  in either case
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© John M. Ackroff 2012  Modal Action Patterns  Stimulus-specific “sign stimulus” / “releasing stimulus” Supernormal stimulus Stimulus that has been exaggerated to get  a stronger than normal response PTSD is a result of sign stimuli   But more later… 
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© John M. Ackroff 2012  MAPs and Natural 
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C&L3 - ConditioningandLearning...

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