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Descriptive only — a measured pattern, no edge claimed.
Analytics module · as of 2026-07-23

Two ways of ranking national teams agree moderately

n=153 shared national teams. Spearman rho=0.6419, Pearson r=0.6369 between trailing-10 form win-rate and net-xG strength -- a parallel-forms rank-stability read, NOT a temporal split-half (that series is absent from the store) and NOT a ...
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confirmednull (a finding)not testabledescriptivepending
Soccer Form Stability
Chart: Soccer Form Stability -- n=153 shared national teams. Spearman rho=0.6419, Pearson r=0.6369 between trailing-10 form win-rate and net-xG strength -- a parallel-forms rank-stability read, NOT a temporal split-half (that series is absent from the store) and NOT a ...
scripts/platformkit/analytics_showcase/out/soccer_form_stability.json2026-07-23

What it means

This is a parallel-forms check: a recent-form ranking and a full-history strength ranking land in broadly the same order (Pearson r 0.6369 alongside the rho 0.6419). Read it as convergent validity -- the two measures see the same underlying quality -- rather than as proof that form persists over time.

Caveats & confounds

DESCRIPTIVE_ONLY, edge_claimed false; NOT a temporal split-half and NOT a predictor (soccer_intl's predictive gate is CLOSED upstream). Form win-rate is quantized to one decimal (tie_fraction_form 0.9346), which inflates ties and pulls the correlation toward zero.