A test is said to be reliable if it
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A test is said to be reliable if it
measures the skill it claims to test
is unaffected by external factors such as the time of administration
gives about the same score to a person when given on different occasions
allows one to correctly predict who will be successful when placed in a real-life situation
Reliability refers to consistency of measurement - a reliable test yields similar scores for the same person across repeated administrations. Validity (option A) refers to measuring what is claimed. Reliability is necessary but not sufficient for validity.