Study 4 · Lead perception
How much lead do you see?
A crossing clay has to be shot at where it will be when the pellets get there, not where it is. How much that is, is arithmetic. How much of it a shooter sees as right is the judgement every rule of thumb in the sport is really about, and nobody measures it. This does: a clay crosses the screen at a known speed, over and over; you set a ring where you would point the gun at the instant you fire; the physics says where the pattern needed to be.
You get a lead profile: how far over or under the shot's requirement you see, whether that changes with speed, direction and the type of target, and how consistent you are. A first result about three minutes in, the full profile in about ten. No account needed; a laptop or desktop with a keyboard and a plastic card the size of a driving licence to calibrate the screen.
On a phone or tablet? This test needs a laptop or desktop with a keyboard and a plastic card. Send yourself the link and come back on one.
Evidence label: measured. An assessment of a perceptual judgement, not a trainer: there is no feedback, on purpose, and nothing here claims to improve scores. Independent research by Dr. Satwant Kumar, under the rules.
- What it measures: your perceived lead against the physics (bias), how repeatable it is (precision), and how it changes with target speed (three speeds), direction (left to right, right to left) and geometry (full crosser, quartering away).
- What it does not: your gun mount, your swing, your timing or your scores. A screen shows the geometry of a lead; it cannot show a gun. Whether a shooter's perceived lead predicts what they do on the ground is exactly what the pooled data will test.
- The simulated shot: a clay at 30 m, pellets taking 0.095 s to get there. The lead that needs is the target's angular speed times that time; the page shows it in degrees at your eye and in feet at the target.
- The gate: a repeat session showing the profile is repeatable before any individual claim is made from it, and a field comparison with real targets before any claim that it says anything about scores.
- What is kept: only if you choose to contribute: the settings, the screen calibration, and an optional questionnaire (age band, discipline, handedness, gun shoulder, how you shoot crossers). Linked to your account by an internal id if you are signed in; anonymous otherwise. No name or email, ever.