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Core Studies: Biological Area

Blakemore and Cooper (1970) early visual experience: conclusions and evaluation

  • 3 things to know
  • Component 02

Overview

Recall questions on Blakemore and Cooper's main conclusion, sensitive periods, explanations for the missing cells, and the evaluation of internal validity, combined measures, ethics, generalising to humans, applications and the behavioural observations.

What you need to know

Answer each one before you reveal it.

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Evaluation

Why does the study have high internal validity?

Key term

What does the study suggest about a sensitive period?

Key term

Give two competing explanations for the missing cells.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    State the main conclusion.

    Model answer

    The functional organisation of the visual cortex is modified by the environment experienced in early life, so the developing brain is plastic rather than fixed at birth.

  2. 2

    What does the study suggest about a sensitive period?

    Model answer

    Restriction during the first months of life produced effects that never fully recovered, implying there is a limited window in which visual experience shapes the cortex.

  3. 3

    Give two competing explanations for the missing cells.

    Model answer

    Either the connections serving unused orientations degenerate through disuse, or the connections serving the experienced orientation are strengthened at their expense.

  4. 4

    Why does the study have high internal validity?

    Model answer

    The rearing environment was controlled so tightly that stripe orientation was effectively the only variable that differed between the two groups.

  5. 5

    Explain one strength of combining behavioural and physiological measures.

    Model answer

    The two sets of data agreed, so the cortical recordings provided a physical explanation for the blindness that had been seen in the kittens' behaviour.

  6. 6

    What is the main ethical objection to the study?

    Model answer

    The kittens were deprived of normal visual experience during development, suffered lasting impairment and were anaesthetised for invasive recording, harm that a cost-benefit argument cannot fully justify.

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