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Core Studies: Biological Area

Regions of the brain: comparing Sperry and Casey et al.

  • 3 things to know
  • Component 02

Overview

Recall questions on the similarities between Sperry and Casey et al. in aims, pre-existing groups, data, samples, validity and debates, their differences in brains studied, methods, time frame, regions, health and ethics, and what the pair adds on localisation, technology and diversity.

What you need to know

Answer each one before you reveal it.

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Study

How did each study obtain its evidence about brain function?

Who and when

How did the two studies differ in the state of the brains they examined?

Key term

Give one difference in the time frame of the two studies.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Give one similarity in the aims of the two studies.

    Model answer

    Both set out to link a specific region or system of the brain to a particular psychological function.

  2. 2

    Both studies compared pre-existing groups. Explain why this matters.

    Model answer

    Neither could randomly allocate participants, since one group had already had surgery and the other had already shown high or low self-control, so both are quasi-experiments and their causal claims are weakened.

  3. 3

    What did the two studies have in common in the type of data they produced?

    Model answer

    Both produced quantitative data gathered under standardised laboratory conditions, which allows objective comparison between conditions or groups.

  4. 4

    How were the samples similar?

    Model answer

    Both were small and drawn from unusual populations, so neither generalises comfortably to people in general.

  5. 5

    Give one shared criticism of validity.

    Model answer

    Both used artificial laboratory tasks that bear little resemblance to the way the brain is used in daily life.

  6. 6

    State one debate that both studies illustrate in the same way.

    Model answer

    Both take a reductionist and biologically deterministic position by explaining behaviour in terms of brain structure or brain activity.

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