Blakemore & Cooper flashcards

Lizzy Attwood
Flashcards by Lizzy Attwood, updated more than 1 year ago


Flashcards on the study by Blakemore & Cooper on the visual neurones of kittens

Resource summary

Question Answer
How many participants were there? 2 kittens
How long per day did the kittens spend in the apparatus? 5 hours
How old were the kittens to start with and for how long did it last? From 2 weeks of age for 5 months
What were the properties of the visual display apparatus? 46cm diameter cylinder Glass floor half way up High contrast black and white stripes (either horizontal or vertical)
Why was it okay that were there no control kittens? There was already an established standard for cat brain development
What happened after 5 weeks in the apparatus? Several hours a day in a well-lit room with objects inside
What were the 6 dependent variables? (what they wanted to observe) 1. ability to move around 2. response to objects 3. jumping to the ground 4. judging distances 5. navigation 6. response to a rod held V or H
At what age were the kittens tested? 7 months
How did they test the kittens after putting them under anaesthesia? Presented either a V or H bright light to eyes - look to see reactions
How else did they test the kittens? Natural startle response - rod moving towards the kitten
What variables were controlled? Time in cylinder Type of cylinder The tests Age Conditions in general
In what way were the test kittens different from normal kittens in their navigating of the room? Touch > sight Not as good at navigation
When would a kitten react to a rod? ONLY when it was the same orientation of the stripes in which they were raised
Even though some of these problems disappeared after 10 hours, what remained impaired? (3) Tracking of objects Bumping into objects Judgement of distance
75% of neurones were ____________ BINOCULAR
What was strange about the polar histograms of the neurone activity? H cat = V neurones inactive within 20 degrees V cat = H neurones inactive within 20 degrees
Why did they conclude that changes are not the consequence of degradation? No evidence of silent or missing cortical cells in the cortex
Neurones change preferred orientation due to what? Stimulation of the visual cortex recieved
Does this suggest that brain plasticity is NATURED or NURTURED? Nurtured
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