General cognitive ability is a strong predictor of job performance especially with regard to task performance aspect.

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Numerous studies have shown that general cognitive ability, as measured by intelligence tests, is a strong predictor of job performance. It is particularly relevant to task performance, which refers to the ability to complete work tasks and achieve goals effectively and efficiently. Other aspects of job performance, such as organizational citizenship behavior (e.g. teamwork, helping others) may not be as strongly related to cognitive ability.

General Cognitive Ability Is a Strong Predictor of Job Performance