A contemporary look at the relationship between general cognitive ability and job performance.

The relationship between general cognitive ability (GCA) and overall job performance has been a long-accepted fact in industrial and organizational psychology. However, the most prominent data on this relationship date back more than 50 years. This meta-analysis examines the relationship between GCA and overall job performance using studies from the current century. Results across 153 samples and a total sample size of 40,740 show a mean observed validity of .16, with a residual