‘What qualities does a good selection technique have?’
This paper explains the qualities that make selection techniques effective and fair predictors of job performance. Good selection methods must demonstrate reliability, meaning consistent results across time, items, and assessors, and validity, meaning they accurately measure what they claim to assess. Research and meta-analyses show that psychometric methods such as cognitive ability tests, personality assessments, structured interviews, assessment centres, and biodata offer strong predictive validity. Each has strengths and limitations regarding cost, fairness, and adverse impact. The paper concludes that the best selection systems combine multiple valid and reliable tools, supported by rigorous design and continuous validation, to ensure fair, evidence-based hiring decisions.
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