Why do employers use psychometric tests?

The tests enable employers technically identify high performers and as such use this elimination strategy to scale down on the number of top candidates for the role, by streamlining the speed of the recruitment process, and providing a logical candidate shortlist and reducing HR costs.

The tests are considered to be reliable indicators of candidate potential and suitability, as a strong correlation between a high score and subsequent high-quality performance in the role that has been identified.