Stanford researchers have found that computers can judge personality traits more accurately than one's friends and colleagues. In fact, artificial intelligence can draw inferences about a person as accurately as a spouse.
PAPER: Computer-based personality judgments are more accurate than those made by humans
but remember: The Big Five normative personality test is obsolete, it has been proven as an incomplete and incorrect model of personality. The HEXACO (a.k.a. Big Six) is another oversimplification.
Online Dating sites OFFERING COMPATIBILITY MATCHING METHODS BASED ON PERSONALITY SIMILARITY have
very big databases, in the range of 20,000,000 (twenty million)
profiles, so the Big Five model or the HEXACO model are not enough for
predictive purposes. That is why I suggest the 16PF5 test instead.
The same applies for Personality Based Recommender Systems.