![]() ![]() Construct validity subsumes the other types of validity.Ĭontent validity describes whether an instrument is systematically and comprehensively representative of the trait it is measuring. For example, a measure of intelligence should only assess factors relevant to intelligence and not, for instance, whether someone is a hard worker. There are four main types of validity:Ĭonstruct validity is the extent to which the instrument specifically measures what it is intended to measure, and avoids measuring other things. This is important if the results of a study are to be meaningful and relevant to the wider population. Validity is the extent to which an instrument, such as a survey or test, measures what it is intended to measure (also known as internal validity). ![]() We are currently in the process of updating this chapter and we appreciate your patience whilst this is being completed. ![]()
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