Question

How they complement each other to make a good research instrument

Answer 1

$\huge\tt\red{A}\tt\pink{N}\tt\blue{S}\tt\green{W}\tt\purple{E}\tt\orange{R}$

Validity implies the extent to which the research instrument measures, what it is intended to measure. Reliability refers to the degree to which scale produces consistent results, when repeated measurements are made. A valid instrument is always reliable. A reliable instrument need not be a valid instrument.

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