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6.4: Biological Influences on Learning

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1 6.4: Biological Influences on Learning

2 Objective(s): Explain how biological predispositions can facilitate learning of some associations.
Agenda: Bellwork, 6.4 notes and discussion, Closure Bellwork: How can previous biological responses affect future conditioning? Lesson #13

3 Conditioned Taste Aversions
Conditioned Taste Aversion-classical conditioning can lead us to develop avoidance reactions to the taste of food Contradicts the other examples of classical conditioning Typically take only one trial to develop Delay between CS and UCS can be long Very specific and display little evidence of stimulus generalization Good sense from an evolutionary standpoint Scapegoat food for cancer patients Contradicts the assumption of equipotentiality—that we can classically condition all CSs equally to UCSs Conditioned Taste Aversions

4 Preparedness and Phobias
People aren’t always afraid of things with which they’ve had the most frequent unpleasant experiences. Preparedness-we are evolutionally predisposed to fear certain stimuli more than others Evolutionary memories Can lead to illusory correlation Laboratory evidence is not consistent May be resistant to classical conditioning Genetic influences Classical conditioning alone can not explain all phobias Preparedness and Phobias

5 The tendency for animals to return to innate behaviors following repeated reinforcement.
Not fully understood by scientists Leads us to believe biological influences place limits on our behaviors Instinctive Drift

6 Closure

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