Validity

The extent to which a study measures what it intends to measure.

The apparent accident also reduced the suggestion that the adult had deliberately changed the quantity. This supports the argument that a child's understanding of the situation can influence the validity of a conservation test. The straightforward procedure can also be repeated to check reliability, although being repeatable does not itself prove that results are reliable.

Whether research measures what it intends to measure and supports an accurate explanation of the behaviour being studied.

Apply each evaluation point to the study: identify the problem, explain its effect on reliability or validity, and suggest a relevant improvement.

A consistent result is not necessarily an accurate measurement: reliability alone does not establish validity.

Distinguish reliability from validity: a consistent score does not necessarily measure the whole of intelligence.

The extent to which a test measures what it claims to measure.

Validity concerns whether a test measures what it claims to measure. Reliability concerns consistency. A test could repeatedly produce the same score while measuring only a limited part of intelligence.

The extent to which a study or measurement assesses what it is intended to assess.

The extent to which a study measures what it intends to measure. In an experiment, internal validity concerns whether changes in the dependent variable can be attributed to the independent variable rather than other influences.

The extent to which research measures what it intends to measure and supports the conclusion drawn from it.

The extent to which a research method measures or captures what it is intended to investigate.

The extent to which a method measures what it intends to measure.

The extent to which a measure measures what it is intended to measure.

The extent to which research accurately measures or represents what it aims to investigate.

The accuracy of a measure: whether it measures what it is supposed to measure.

Definition

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AQA GCSE Psychology · 8182

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OCR GCSE Psychology · J203