PSA Sensitivity Method
Use the PSA (Perfect Sensitivity Approximation) iterative method to find your ideal aim sensitivity. This systematic A/B comparison process narrows down your optimal sensitivity through direct feeling-based testing β not theory, not averages.
- Start with your current sensitivity as the midpoint.
- The tool generates a high and low test sensitivity above and below.
- Play a short session with each, then report which felt more controlled.
- Iterate β the tool narrows the range each round until you reach equilibrium.
The PSA method works because your nervous system accurately detects "too fast" vs "too slow" but cannot self-report the exact optimal number. Forced binary comparisons bypass the need for self-reporting.
What This Method Measures: Your Neuromuscular Sensitivity Optimum
The PSA (Perfect Sensitivity Approximation) method is an iterative binary search for your subjective optimum mouse sensitivity β the value at which your motor control system can most accurately and consistently move the cursor to a target. It does not measure hardware. It measures the intersection between your hardware setup, your grip, your arm movement range, and your trained motor programs. This iterative binary search narrows down your physical optimum; compare your hit rate on a mouse tester.
It works because your nervous system is accurate at detecting relative comparison ("this feels too fast/too slow") but poor at reporting absolute values ("my optimal sensitivity is exactly 0.73"). PSA exploits this by presenting forced binary choices: test sensitivity A vs. test sensitivity B. Which felt more controlled? The answer consistently converges on a stable optimum within 6β10 rounds of comparison.
How to Run the PSA Method Correctly
- Set a start range: Choose a high sensitivity and a low sensitivity you are sure contain your ideal. Your current sensitivity is a good midpoint estimate.
- Test each sensitivity for exactly the same task: A short aim-training session, deathmatch warmup, or the targeting accuracy test here. Use identical conditions β same map, same targets, same duration.
- Report the perceived control: After each pair of sessions, choose which felt more controlled β not which produced better statistics necessarily, but which felt less like you were fighting the cursor.
- Iterate: The tool adjusts the range for the next round based on your choice. After 6β10 rounds, the high and low values converge within ~0.05 of each other β that's your PSA optimum.
Common Causes of Indecisive PSA Results
- Mouse acceleration active: Pointer acceleration makes sensitivity variable by speed, which means there is no single "optimal" value β fast and slow movements produce different effective sensitivities. Disable acceleration before running PSA.
- Muscle memory interference: If you have used a specific sensitivity for years, your nervous system will initially prefer that value even if it is not your biomechanical optimum. Run PSA after a 1-week adjustment period at a neutral new sensitivity to reduce memory bias.
- Testing different conditions in each round: Testing A on a warmup server and B in a competitive match introduces context-variable noise. Test both in identical environments.
Connecting PSA Results to Other Tests
Once you have your PSA optimum sensitivity value:
- Use the Sensitivity Converter to translate it to all other games you play.
- Use the eDPI Calculator to record your optimum as an eDPI number β so you can recover it even after changing hardware DPI.
- Run the aim precision tool before and after PSA to quantify whether your accuracy percentage improved.
Struggling to find the perfect sensitivity through trial and error? Read our complete guide on how the PSA sensitivity method works step by step β and learn how to express your PSA result as a portable eDPI value by reading what eDPI measures and why it matters.
Typically 6β10 rounds. The range halves with each round, so by round 8, you have narrowed a 10-sensitivity range down to within ±0.04. Most players find a stable result within 7 rounds.
Yes, initially. Give it 1β2 weeks of play before overriding β your existing muscle memory will resist any change, even improvements. The PSA number is what your motor system responds best to, not what feels familiar.
Yes. PSA is agnostic to your starting point β it works equally well for players using 200 eDPI and those using 2000 eDPI. The method converges on your biomechanical optimum regardless of your absolute starting range.