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Evaluating and Validating Research

Reliability

  • 3 things to know
  • Component 2

Overview

Recall questions on Reliability.

What you need to know

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Key term

Describe how split-half reliability is assessed.

Key term

What does reliability mean in psychological research?

Key term

Define external reliability.

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    What does reliability mean in psychological research?

    Model answer

    Reliability is the consistency of a measurement, so that repeating it under the same conditions produces the same result.

  2. 2

    Define internal reliability.

    Model answer

    Internal reliability is the consistency of a measure within itself, so that all of its items or components are measuring the same thing.

  3. 3

    Define external reliability.

    Model answer

    External reliability is the consistency of a measure across separate occasions, so that it gives the same result when used again.

  4. 4

    What is the key difference between internal and external reliability?

    Model answer

    Internal reliability concerns consistency within the measure at one point in time, whereas external reliability concerns consistency of the measure over time.

  5. 5

    Describe how test-retest reliability is assessed.

    Model answer

    The same test is given to the same participants on two separate occasions and the two sets of scores are correlated.

  6. 6

    Which type of reliability does test-retest assess?

    Model answer

    It assesses external reliability, because it compares performance across two different occasions.

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