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March+7+learning

March+7+learning - Learning Acquiring new knowledge...

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3/6/2014 1 Learning Acquiring new knowledge, behaviors, skills, understanding, preferences .. – Non-associative learning – Associative learning • Arguments against insect learning : Small body size/small brain Short lifespan Can Insects Learn? These organisms can learn –Fruit flies, whose brain contains approximately 200,000 neurons –In roundworms, ( Caenorhabditis elegans ), with only approximately 302 neurons http://www.nematode.net/IMAGES/c elegans.jpg http://www.everythingabout.net/articles/biology/animals/arthropods/insects/flies/fruit fly/fruit fly laying egg full.jpg
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3/6/2014 2 Rejecting the “short life-span” argument: –One benefits from learning when there exists opportunities to use what was learned –It may take only seconds to minutes to learn and use newly acquired knowledge. Non-associative learning Habituation: a progressive decrease of behavioral response probability with repetition of a stimulus – No reinforcement or consequence of not responding What practical problems could be associated with Habituation in insects? Habituation can cause problems
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3/6/2014 3 Associative Learning Classical conditioning: repeatedly pairing an unconditioned stimulus (which evokes a particular response) with a previously neutral stimulus. – Following conditioning, the response occurs both to the unconditioned stimulus and to the other, unrelated stimulus. – Pavlov’s dogs Conditioning Associate Neutral Odors with Food or Hosts
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3/6/2014 4 Examples of Learning Four categories of information leared: Spatial environmental configurations Sensory information Motor patterns Associations between perceived stimuli and environmental states Examples of Learning • Spatial Environmental
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