Paper 1 · Teaching Aptitude
Essay-type tests are not reliable because
ATheir answers are different
BTheir results are different
CTheir checking is affected by the examiner's mood ✓ Correct
DTheir responding styles are different
Correct answer: (C) Their checking is affected by the examiner's mood — Essay-type tests are not reliable because their checking is affected by the examiner's mood, so that is the answer.
Explanation
★Essay-type tests are not reliable because their checking is affected by the examiner's mood, so that is the answer.
★Reliability means the test gives the same result no matter who marks it or when.
★But an essay is marked by human judgement, which shifts with the examiner's mood and view.
★So the same answer may earn different marks from different examiners, lowering reliability.
★That answers differ is natural in essays and is not by itself the cause of unreliability.
★Differing results and styles follow from this subjective marking, so the root cause is that checking depends on the examiner's mood.
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