The shorthand equation P = p – i comes from the landmark sports psychology book The Inner Game of Tennis by Timothy Gallwey. It serves as a foundational formula for coaching and peak human performance.
The Formula Expanded
(P) (Performance): The actual result or level of execution achieved on or off the court.
(p) (Potential): An individual’s natural capabilities, skills, and maximum capacity.
(i) (Interference): The psychological obstacles that block potential, such as self-doubt, fear of failure, overthinking, or performance anxiety.
Core Concept
The core philosophy of the equation is that your ceiling is rarely the issue. Your talent and capabilities (p) are already there. To maximize your output (P), your focus should not just be on working harder, but on actively reducing the interference (i) generated by your mind.
To reduce mental interference (i) and maximize performance (P), you must shift your mind from a state of judging to a state of focused awareness.