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The Kitten Carousel (Held and Hein)

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by

Christina Keene

on 9 April 2015

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Transcript of The Kitten Carousel (Held and Hein)

Strengths
- matched experience of all kittens
Visual Example
Procedure
2. Pairs in group X were exposed only to darkness from birth until one kitten from each pair was old enough to coordinate and walk around (8-12 weeks)
Findings
1. All kittens responded normally to pupillary reflex, tactual placing and pursuit of a moving object, showing no impairments.
Background
-Is visual perception a result of nature or nurture?
The Kitten Carousel (Held and Hein: 1963)
Tests
Conclusion
-Self-produced movement with concurrent visual feedback is necessary for the development of normal visually guided behavior.
Presentation by Christina Keene
Aim/Hypothesis
-This study tests the theory that a kitten needs to see and move for itself in an environment for it to develop normal movement patterns.
Controls
-All kitten pairs in each group were exposed to the same environment for the same amount of time
and performed the same tests.
-All pairs lived in the same conditions
with their mothers and litter mates.
1. The 10 pairs of kittens were divided into two groups (8 pairs in group X and 2 pairs in group Y).
3. Pairs in group Y were exposed to darkness for two weeks, then from 2-10 weeks they were exposed to the patterned environment for 3 hours a day.
4. All pairs were placed in the kitten carousel for 3 hours a day. One kitten could walk around (the active kitten) and the other could not touch the ground (the passive kitten).
5. Each kitten took place in six different tests (3 main tests and 3 additional tests).
Main: 1. Test of visually guided paw-placement
2. Avoidance of a visual cliff
3. Blink to an approaching object
Additional: 4. Pupillary reflex to light
5. Tactual placing response
6. Visual pursuit of a moving object
2. Active kittens in group X showed visually guided paw placement while passive kittens did not. The same results were found in the blink test.
3. Passive kittens did not react normally when tested on the visual cliff while the active kittens did.
4. Passive kittens in group Y showed the same results for paw-placement and visual cliff as those in group X.
5. After 48 hours of exposure to a normally lit room all kittens showed normal behavior
on all tests with no after effects
of the experiment.
- highly controlled
Weaknesses
- low ecological validity
- debatably unethical
Full transcript