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All 10 Flashcards — Reliability
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Question
What is reliability?
Answer
The consistency of a measure — the same result under the same conditions.
Question
What is test-retest reliability?
Answer
Giving the same test to the same people twice; stable scores mean it is reliable over time.
Question
What is inter-rater reliability?
Answer
Different observers rating the same behaviour and closely agreeing.
Question
What is internal consistency?
Answer
Questionnaire items meant to measure one thing giving similar answers.
Question
Reliable but not valid — example?
Answer
A scale that always reads 5 kg heavy: consistent, but consistently wrong.
Question
Why is reliability 'necessary but not sufficient'?
Answer
A measure can be consistent yet consistently measure the wrong thing.
Question
How do you improve inter-rater reliability?
Answer
Train the observers and use a clear, agreed coding scheme.
Question
What does test-retest need to work?
Answer
That the thing being measured has not really changed between the two tests.
Question
Reliability vs validity in one line?
Answer
Reliability = consistent; validity = measuring the right thing.
Question
Which concept is this?
Answer
Measurement — one of the six core concepts.
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Full study notes for Reliability
Topic 1.4 hub
Measurement
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