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Key Concepts and Theories of Research

Reliability and replication

  • 3 things to know
  • AS Unit 2 and A2 Unit 4

Overview

Reliability as it is used in sociological research, why structured questionnaires are considered highly reliable and inter-observer reliability.

What you need to know

Answer each one before you reveal it.

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Key term

Define reliability as it is used in sociological research.

Key term

Explain why structured questionnaires are considered highly reliable.

Key term

Why are unstructured interviews usually low in reliability?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Define reliability as it is used in sociological research.

    Model answer

    Reliability is the extent to which a method, repeated in the same way, produces the same results.

  2. 2

    Why is replication central to the positivist idea of reliability?

    Model answer

    Because another researcher must be able to repeat the procedure exactly and check whether the same findings appear, which is how a claim is tested.

  3. 3

    Explain why structured questionnaires are considered highly reliable.

    Model answer

    Every respondent is asked the same questions in the same order with the same answer options, so the procedure can be repeated identically.

  4. 4

    Why are unstructured interviews usually low in reliability?

    Model answer

    Each interview follows a different course and depends on the rapport and wording of that particular exchange, so it cannot be repeated exactly.

  5. 5

    What is inter-observer reliability?

    Model answer

    The extent to which two or more observers watching the same behaviour record it in the same way.

  6. 6

    How can a researcher improve inter-observer reliability in a structured observation?

    Model answer

    By using a pre-set observation schedule with clearly defined behaviour categories and training observers to apply them consistently.

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