Of course you can. It's not a unique tendency uncorrelated with all other aspects of personality/temperament/anxiety. There are expecially emotional people, especially neurotic people, especially gloomy people – and their opposites, who remain cold in the same situations that freak others out. And it's largely, though not perfectly, predictable.
Many people will have enough of a self-conception – like the author of the post to which I replied – that they will have a fairly accurate idea of how they'll react.
Any many "in the middle" might, by considering, rehearsing, & precommitting to moods/strategies beforehand, helpfully prep/prime themselves to more-calmly handle whatever probabilistic results come back.
Those too concerned, by their own self-knowledge or that of experts/pretests, can skip the risk of "knowing too much" via an elective test, while others can proceed, knowing the risks, with informed consent.