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Lecture 18

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Psychology 2115A/B

Lecture 18 Perceptual development continued Restrictive rearing  Take an orgasm, and put in in an environment where they can’t learn anything. Let them mature (put them in the dark- doesn’t have to be completely dark because they will completely lose their ability to see, but dark enough so they don’t have to use there visual system)  CANT do this with kids, obviously o BUT there are some situations where this happens  For example people born with cataracts- they used to not get surgery for a long period of time.  There was a period of time, where people would have cataracts for most of there life Senden  Restrictive rearing situation- where people had cataracts for most of there life  For things that were new to a person- those perceptual abilities came very quickly (distinguish colours- this was very easy)  The problems that they had is when people had already learned things using there other sense- shapes were hard (distinguish square from a circle) this is because they had learned all of this by using there hands  Things can happen over maturation that can change how you learn  Launches us into the question- what happens with the animals? Experiments- with cats  Put them in this restrictive rearing situation (with blurry lenses)  The animal stays fed and warm  Experiment- get the cat to jump from one table to the next, if the cat has had the lenses on, their depth perception may be off, they may fall off, where other cats would not  “The visual cliff” o Eleanor Gibson o You have a checker board pattern- the animal has no problem perceiving it. This is all on plexi-glass o It continues, but the floor under the plexi- glass is not right under, it is way below it- this creates the illusion of a cliff, even though there isn’t one o Any orgasm will avoid “the cliff” o This has also be done with young children (4- 6 months)- the mother stand on the opposite side (the deep side) BUT the kid will not crawl over to her o Babies that are one month old- are put face down and the can recognize depth o If you take an animal that has been restrictively reared- they will wander onto
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