tl;dr: A developer took an online ADHD assessment, captured its JavaScript source, and reverse-engineered how it tracks spacebar presses, "bad" keypresses, and window focus loss to score four metrics (Attentiveness, Timeliness, Impulsiveness, Hyper-Reactivity). They also discovered they could sign up for a free provider trial account and administer tests to themselves, running a controlled experiment comparing a "spam" run (flagged low-credibility) versus a serious attempt (flagged high impulsivity). The psychiatrist ultimately confirmed an ADHD diagnosis.