Speed vs Accuracy
Reflex Lab · human performance
As visual events arrive faster, people usually become less accurate. That is not a moral failing — it is a fundamental tradeoff in sensorimotor control.
Why mistakes rise with speed
- Less time to sample the stimulus before committing a response
- Higher motor urgency → earlier, noisier movements
- Working memory and attention switches get interrupted mid-plan
Anticipation: help and hazard
Predicting “when” something will appear can shave tens of milliseconds. Predicting wrongly produces false starts — the same failure mode as tapping before green in a reaction test, or tapping a bomb that looks like a drop for a frame.
Visual targets matter
Large, high-contrast, predictable targets support both speed and accuracy. Small, fading, or decoy targets force classification work (choice RT) on top of simple speed.
What “faster” usually costs
In a pure simple-RT task, rushing mostly means false starts. In a classification task (go vs no-go), rushing raises wrong taps. In a precision task (hit a small target), rushing raises misses and “Okay” instead of Perfect. The same person can look “fast” on one test and “sloppy” on another — because the required accuracy constraint changed.
Focus Drop as a worked example
Campaign levels increase drop speed, concurrency, and special-drop density. Scoring further punishes late catches (0.6× height) while rewarding early precise taps. The design goal is to make the speed–accuracy tradeoff visible in score and lives — not merely “harder numbers.”
See also Focus Drop reaction study · What is reaction time? · How we designed Perfect taps.