SIQX (Situational IQ Index) measures the behavioral decision quality of MLB hitters and pitchers using Statcast plate discipline data — identifying who is making good decisions before the box score catches up.
SIQX v9 scores hitters on five Statcast plate discipline inputs, each percentile-ranked against all qualified hitters in the current season before weighting.
The same outcome can result from excellent decisions or poor decisions that happened to work. SIQX identifies which is which — before the results correct.
Full research paper with component definitions, validation statistics, bullpen separation methodology, composite weight history, limitations, and live pick record.
Working paper covering SIQX v9 (hitters), PSIQX v1 (pitchers), bullpen model, composite pick model with full validation, feature roadmap, and threats to validity.
The same discipline that powers SIQX — identifying signal in behavioral data at scale — is the foundation of my professional work in machine learning systems. SIQX applies that expertise to baseball: measuring not what players do, but how they decide. I also run Precision Baseball Academy, a player development program in Tampa that uses data to develop better hitters and pitchers.
Daily pick cards, team analysis, breakout and regression flags, and weekly SIQX reports — all on Twitter.
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