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Planning Psychological Research

Methodologies: Case studies, Cross-sectional studies and Self-reports

  • 3 things to know
  • Component 2

Overview

Recall questions on Case studies, Cross-sectional studies and Self-reports.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Key term

What is a cross-sectional study, and what is a cohort effect?

Evaluation

Distinguish quantitative from qualitative data, giving one advantage of each.

Key term

Distinguish primary from secondary sources of data.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What is a case study?

    Model answer

    It is an in-depth investigation of a single individual, small group or institution, usually drawing on several sources such as interviews, observations, test results and records.

  2. 2

    Give one strength and one weakness of the case study.

    Model answer

    It provides rich detail about rare cases that could not be created experimentally, but the findings come from one unusual case, so they generalise poorly and often rely on retrospective and subjective accounts.

  3. 3

    Name three brain-scanning techniques and state what each measures.

    Model answer

    Functional magnetic resonance imaging measures changes in blood oxygenation as an indirect index of neural activity, electroencephalography records the electrical activity of the cortex through scalp electrodes, and positron emission tomography tracks a radioactive tracer to map metabolic activity.

  4. 4

    Give one strength and one weakness of using brain scans in psychological research.

    Model answer

    They give objective, non-invasive evidence about living brain function rather than relying on what people say, but they are expensive, the setting is highly artificial, and activity in a region does not prove that region causes the behaviour.

  5. 5

    What is a longitudinal study, and what is its main practical problem?

    Model answer

    It follows the same participants over an extended period, re-testing them at intervals; its main problem is attrition, as participants drop out over time and those who remain may be unrepresentative.

  6. 6

    What is a cross-sectional study, and what is a cohort effect?

    Model answer

    A cross-sectional study compares different groups, usually different ages, at a single point in time; a cohort effect is when an apparent developmental difference is actually caused by the groups having grown up in different eras.

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