Answered by Mike, Hiring Expert at Avery Dennison Corporation, on Friday, August 12, 2016
Depending on the test and the role, personality tests/assessments could be very beneficial.
With that said, though, there are some limitations. The validity of the test plays a major factor in whether or not the test can provide any valuable data. If you're taking a Facebook - "10 questions to determine your ideal job" type test, you're probably not going to get any information that is either reliable or valid. But, thoroughly-vetted and validated personality assessments might be able to provide some insight that is both accurate and helpful.
Also, depending on what job you are in, the results might have a different level of impact. For example, it is well researched that one's personality can have a direct correlation to performance in sales roles. For highly analytical or desk-strapped roles, personality might have a more minimal impact.
In either case, if it is a well-created assessment that has been validated against a job where personality might play a role in the individual's overall performance, it could be a useful tool. I'd say take the test, and absorb the information along with feedback you regularly receive from others. It might help shed some light on areas you could improve for the future. Or, it could just be a nice talking point for Thursday happy hour.