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Properly developed psychometric tests and questionnaires, when used by competent and appropriately qualified individuals, have the following advantages:
- They lead to judgements that are likely to be more valid than judgements made by other means. This is the most important advantage of psychometric assessment.
- They are relatively cheap and easy to administer when compared to other approaches. For example, although it may seem relatively expensive for a company to pay for its staff to become qualified in psychometric assessment and then on top of this to pay for the cost of the testing itself, these costs pale into insignificance when one considers just how long it would take to obtain the same information about a person. At the risk of putting it simplistically, it could be argued that the information obtained from a good personality questionnaire might take several months of knowing and working with a person to obtain by other means.
- They are likely to lead to considerable cost-benefits in the long term. Whether it be for selection of new staff or development of existing staff, the expenses involved in psychometric assessment are minimal when compared with the costs of high-turn over, under-performance or misdeployment of staff.
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