How does your mental state affect results in numbers?

Everyone knows that your psychological state affects your play, but for a long time it seemed impossible to measure this effect in precise numbers. At FirstFund we decided to test this in practice: our analysts spent a whole year studying the metrics of 750 players.
The study clearly proved that mental preparation isn't an abstract concept but a very concrete factor that directly affects long-run profit:
🟡 +0.5 evbb/100 to winrate — that's the steady gain players get, and this effect holds consistently over a six-month period.
🟣+5% to +9% to ROI thanks to managing attention during a session, developing emotional intelligence, and eliminating unconscious thinking errors.

The numbers showed that mental work delivers a very measurable boost to expected value and is just as important an element of professional poker as strategy work.

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