27 - Conditioning.txt

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4 Dec 2014
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November 26 2014
TL - 11
Operative conditioning
Discrimitive stimulus
sets the occasion for
A response
which leads to
Consequence
which strengthens/weakens connection between DS and R.
At the park with child. how to explore park, but avoid the road.
(-P) Leave park if child goes to road
Practice:
Find all cases of Operative conditioning in "Space Invaders"
Describe how to use +/- reinforcement/punishment for:
Keep little bro out of room
Teach dog not to bark.
Shaping by successive approximations
Sometimes we might want an organism to learn to do something so complex that
it would be unreasonable to expect that animal to get the behaviour in one
go.
Parrot on a bicycle.
Turn towards bicycle
Turn towards bicycle + go towards
Turn towards bicycle + go towards + claw on wheel
Turn towards bicycle + go towards + claw on wheel + beak on handlebar
Turn towards bicycle + go towards + claw on wheel + beak on handlebar +
pedel.
Partial reinforcement
Actions can have desireable and undesireable event if they are not
reinforced/punished every time. Organisms learn the expected values of
their actions
Reinforcement schedules
Fixed ratio
"Buy 7 Get 1 Free"
reinforced every nth time behaviour is produced
Getting a lollipop when you go to the doctors (n = 1)
Variable ratio
Every instance of the desired behaviour has an X% chance of being
reinforced
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