bjective measurement in sport—think GPS-derived sprint distances, power output in watts, or saliva cortisol levels—gives us hard numbers that travel well across labs and leagues. Subjective measurement—like an athlete's felt sense of fatigue, a scout's instinct, or a coach's eye test—offers richness that no sensor can fully capture. But here's the hidden challenge: both paths lead straight through the human mind. Drawing from the psychology of financial decision making, we know that framing effects, availability heuristics, and emotional contagion distort how we collect, weight, and act on information.