Gibson and Walk- Procedures

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What was G&W research method?
A laboratory experiment at Cornell University.
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What did G&W sample consist of?
36 human infants aged 6-14 months.Animals just able to move- 1 day old chicks, lambs, goats, 4 week old kittens-some reared normally or in dark for 27days, 4 week old rats-some wore hoods- used whiskers not sight,others reared in dark. Pigs, dogs,
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36
Number of human infants
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How old were the human infants?
6-14 months (with independent locomotion)
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How old were the chicks, lambs and goats?
1 day old
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How old were the kittens?
4 weeks old
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27
Number of days that some of the kittens were reared in the dark for.
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How old were the rats?
4 weeks old
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What were the difference in the rats?
Some wore hoods so they used their whiskers, not their sight. Others were reared in the dark.
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What were the difference in kittens?
Some were reared normally, some were reared in the dark for 27 days.
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What did the visual cliff consist of?
A large glass sheet supported at least 30cm above the floor. On 1 side a sheet of patterned matierial placed under glass (shallow side) & on other side, the same patterned material was laid on the floor, giving the perception of a drop (deep side)
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Where was the infant placed?
On the centre board to see if it would crawl to its mother who was calling to it from the 'shallow' side & then from the 'deep' side.
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Where was the young animal placed?
On the centre board to see whether it moved on to the shallow and/or deep side.
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How were confounding variables controlled?
eg. reflections from the glass by lighting the visual cliff from below the glass.
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How did G&W address some ethical issues?
By using a lass shelf to create the illusion of a cliff. This ensured the pps safety, even on the 'deep' side ie. they protected the pps from harm.
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What did G&W sample consist of?

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36 human infants aged 6-14 months.Animals just able to move- 1 day old chicks, lambs, goats, 4 week old kittens-some reared normally or in dark for 27days, 4 week old rats-some wore hoods- used whiskers not sight,others reared in dark. Pigs, dogs,

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36

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Card 4

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How old were the human infants?

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Card 5

Front

How old were the chicks, lambs and goats?

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