PSA Method Tool
Systematically isolate your 'Perfect Sensitivity' through iterative performance testing.
Step 0: Initial Base
Enter a sensitivity where a full swipe across your mousepad results in exactly one 360° turn.
Round 1 / 7
Try both values below in Aim Lab or your favorite trainer. Which feels more natural?
0.50
Focus on tracking accuracy.
1.50
Focus on speed & turns.
Current Base Range: 1.00
Calibration Complete!
Your mathematically ideal sensitivity based on performance testing is:
Use this value for 30 days to build deep muscle memory before making any more changes.
The Mathematics of Aim Perception
Finding your perfect sensitivity isn't about numbers—it's about proprioception. This is your brain's ability to sense the position and motion of your limbs in 3D space. The PSA Method (Perfect Sensitivity Approximation) was developed by top FPS researchers to bypass subjective feelings and use iterative testing to find your "Neutral Pivot Point." Start with a solid baseline from our main eDPI calculator.
The science behind it is simple: your brain has an easier time identifying "Extreme Errors" than "Perfect Accuracy." By forcing you to compare a very slow sensitivity to a very fast one, the tool isolates your comfort zone faster than months of random tweaking.
The 1.5 and 0.5 Multiplier Rule
The PSA method uses a 1.5x multiplier for the "High" value and a 0.5x multiplier for the "Low" value. This creates a wide gap where the "Middle" point is your current base. Each time you choose the 'better' feeling value, the gap narrows. By the 7th round, the mathematical difference between your choices is negligible, leaving you with a highly refined setting.
Optimization Secret:
When testing, favor 'Tracking' during the Lower Limit rounds and '180-Turns' during the Higher Limit rounds. The perfect sensitivity should allow you to track a moving circle smoothly while still allowing for a snapped turn to your back. Check out Aim Lab for the best tracking scenarios.
Iteration Logic Breakdown
| Step | Action | Result |
|---|---|---|
| 0 (Setup) | Full Pad 360° | The Global Base |
| 1 - 3 | Choice of Polarities | Coarse Isolation |
| 4 - 6 | Micro-Selection | Fine-Tuning |
| 7 (Final) | Final Selection | Master Setting |
For a full breakdown of the math involved, see our technical methodology or refer to Liquipedia's sensitivity guide.
Consistency Post-Calibration
The 100-Hour Rule
Once you find your PSA value, your aim might feel slightly slower or faster than your old setting. You must resist the urge to change it back. Give your neural pathways 100 hours of actual gameplay to 'burn in' the new physical distances for your arm and hand.
DPI Lock
Never change your DPI after finding your PSA result. If you must change DPI (e.g. 800 to 1600), use our Sensitivity Converter to normalize the number, but do not re-run PSA unless your physical surface or mousepad material changes significantly. You can also verify your true DPI with our DPI Accuracy Tool.
Warmup Requirements
PSA settings work best when you are at the 'Median' of your physical ability. Do not run this test if you are extremely fatigued or have consumed excessive caffeine, as this will result in a sensitivity that only works during atypical physical states.