Entertainment Weekly: The murder that changed reality TV, 61 Feb. 2020.  While the specific process varies by show, generally candidates first fill out a detailed packet of personal information containing "every address you've every had, every job You've ever had, everything from your mortgage to your car," says Jodi Wincheski, who competed on CBS' The Amazing Race in 2009 and now works as a casting producer for Survivor.  Then comes psychological evaluation, which includes written testing and an interview with a psychologist.