Squat jump is both an exercise for improving jumping ability and a test of it. You can see it used as a test in a contest between a dancer and a weightlifter in the video posted at stadion.com/confidence-and-jumping-ability-dancer-vs-weightlifter/
After viewing the video answer this question: What instructions would you give the dancer so that she doesn’t develop the mental block that kept her from jumping at the top of her potential? I mean, how would you let her safely check whether she can jump at a given height of the platform or not, so she would not make needless attempts that only create and strengthen a fear-based block? (And in the shown setup her fear is well-justified.) If you know, please share your knowledge by commenting on the post.