Although tend to have high predictive validity in many types of jobs, their usage in employee selection is controversial because they tend to result in lower selection rates for minority applicants.

Cognitive ability test

Explanation:

Cognitive ability test are test used in measuring applicants cognitive function in specific areas. Areas may include verbal reasoning, numerical reasoning, quantitative reasoning, spatial reasoning and so on. They are aptitude test used in predicting the the applicant future aptitude position. It is a method employed by many corporations in non applicant selection. However, the cognitive test has been shown to always results in lower selection of minorities both racial and ethnicity wise.

24 years, i believe is the correct answer.