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Validity - Essay Example

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Measurement can be defined as the systematic and replicable process by which events or objects are quantified and classified with reference to a particular dimension. Reliability of a measurement defines the degree to which a measurement can be relied upon to secure consistent…
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Download file to see previous pages... Validity can be face validity, criterion-related validity, formative validity and sampling validity (Klaus, Boyle and Simon, 13). Reliability and validity are related i.e. closely inter-dependent. Although validity cannot exist without reliability, the latter can exist without validity. Some of the systematic factors that affect both the reliability and validity of measurement include presence of unsystematic events, systematic inconsistency and the change in the event being measured. The unsystematic threats to reliability include subject reliability, situational reliability, observer reliability, instrument reliability and data processing reliability (Klaus, Boyle and Simon, 13). Some of the factors to consider in ensuring reliability and validity include time and money, difference in the measurement expected and reference to a previously validated measure. Some of the measures that can be applied in the improvement of the validity and reliability include ensuring that the goals are vividly defined and put into practice, matching the assessment measures to the set goals and objectives, presenting the tests for review to other interested parties, actively involving all participants in a measurement exercise, and comparing the measure with other measures that are ...Download file to see next pagesRead More
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