Learning - PSB3340 1 April 2008 Learning We change with...

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PSB3340 1 April 2008 Learning We change with experience; encounters with our environment alter our behaviour. - Survival Types of learning - Perceptual - Stimulus-response - Motor - Relational (spatial relations, temporal relations; most complex) Perceptual Learning - Ability to learn to recognize stimuli that have been perceived before. - Identify and categorize objects - Profit from experience—good or bad? - Recognize a particular stimulus Accomplished primarily by changes in sensory association cortex - Visual stimuli in visual association cortex Stimulus-Response Learning - Make a particular response in the presence of a particular stimulus - Associative learning - Behaviour could be autonomic (defensive reflex) o Normal behaviour that can be learned - Two major categories o Classical conditioning o Instumental conditioning Classical - US UR - CS-US UR/CR - CS CR - Pavlov’s dogs - Air puff/tone o Neural Model: Hebb Rule o New connections can form between stimuli: neuron for blink reflex from air puff connects to auditory neuron hearing the tone so both produce a blink. o The neuron learns/assumes that the tone is responsible for the eye blink. Later, when there is no air puff but the tone is still present, a blink still occurs. o “Neurons that fire together, wire together.” o Model used for artificial intelligence
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Operant (Instrumental) - Change a behaviour over time by reinforcement - Between detection of stimulus (perceptual system) and control of a behaviour (motor system), some sort of reinforcement (positive, negative, punishment) occurs. - Reinforcing stimulus: appetitive, makes behaviour more frequent - Punishing stimulus: aversive, makes behaviour less frequent - Skinner’s box Motor Learning - Component of stimulus-response - requires environmental feedback Relational Learning - Learn relationships among stimuli - More complex - Interconnections between association cortices - Ex: hear a cat meow in dark—visualize cat, imagine how its fur feels - Binding problem o How do we mix together different aspects of an object and store them in
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This note was uploaded on 04/18/2008 for the course PSB 3340 taught by Professor Smith during the Spring '08 term at University of Florida.

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Learning - PSB3340 1 April 2008 Learning We change with...

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