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Core Studies: Biological Area

Blakemore and Cooper (1970) early visual experience: procedure and results

  • 3 things to know
  • Component 02

Overview

Recall questions on the conditions in Blakemore and Cooper's study, the kittens' introduction to a lit room, behavioural deficits and recovery, behavioural blindness, single-neuron recording and the central neurophysiological finding.

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Key term

What was the only difference between the two conditions?

Key term

Which deficits improved and which persisted?

Key term

What is meant by saying the kittens showed a behavioural blindness?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What was the only difference between the two conditions?

    Model answer

    Whether the stripes on the cylinder wall ran vertically or horizontally.

  2. 2

    At what stage were the kittens first brought into a normally lit room?

    Model answer

    At about five months old, when they were taken for a few hours each week into a well-lit room containing furniture and their behaviour was observed.

  3. 3

    What two behavioural deficits appeared when the kittens first entered the lit room?

    Model answer

    They showed no startle response when an object was thrust towards them, and they had no visual placing reflex, bumping into furniture as they moved about.

  4. 4

    Which deficits improved and which persisted?

    Model answer

    The gross disorientation faded after some hours of normal vision, but the kittens remained clumsy and continued to misjudge the position of objects.

  5. 5

    What is meant by saying the kittens showed a behavioural blindness?

    Model answer

    Each kitten responded only to lines matching the orientation it had been reared with, so a vertically reared kitten would follow and bat at a vertical rod but ignore a horizontal one.

  6. 6

    How was the activity of single neurons recorded?

    Model answer

    Under anaesthesia a microelectrode was inserted into the primary visual cortex and the firing of individual cells was recorded while a bright bar of light was moved across the visual field at different angles.

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