Paper 1 · Research Aptitude
A research instrument giving inconsistent results has
ALow validity
BHigh validity
CLow reliability ✓ Correct
DHigh reliability
Correct answer: (C) Low reliability — An instrument giving inconsistent results has low reliability, so that is the answer.
Explanation
★An instrument giving inconsistent results has low reliability, so that is the answer.
★Reliability means the instrument gives consistent results on repeated use.
★So inconsistent results directly show that its reliability is low.
★Validity is about measuring the right thing, a separate quality from consistency.
★The results being inconsistent is precisely a lack of reliability, not high reliability.
★So an instrument with inconsistent results has low reliability.
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