What is the Bias Score and how is it calculated?

The Bias Score compares a team's win rate under a specific referee to their baseline win rate (45%). A negative score suggests the team performs worse than average under that referee.

What sample size is considered reliable?

We recommend at least 5 games for initial patterns and 10+ games for high confidence.

← Back to Home•View All Teams for S Purkiss →•View All Referees for Portsmouth →

🧑‍⚖️ Referee Analysis⚠️ BIAS DETECTED

S PurkissvsPortsmouth

Analysis based on 7 matches since 2000

* Note: Detailed card statistics for matches before 2005 may be incomplete.

Wins

Draws

Losses

When S Purkiss officiates Portsmouth matches, the statistics reveal a severe negative pattern. Based on 7 matches spanning multiple seasons, our comprehensive analysis shows Portsmouth achieves a 14.3% win rate under S Purkiss, compared to the 45% baseline expected for teams at this level. This negative 30.7 percentage point difference suggests a meaningful pattern worth examining. The data includes detailed card statistics, match outcomes, and historical trends to provide football fans, bettors, and analysts with evidence-based insights into this referee-team dynamic.

🚨STRONG BIAS DETECTED

🚨 STRONG BIAS DETECTED

This referee has a significantly negative history with this team. Win rate is severely below average.

Bias Score

-30.7%

Matches Analyzed

⚠️

Notable Negative Pattern

With a bias score of -30.7%, this ranks among the more significant negative patterns in our database. Over 7 matches, Portsmouth has won 31 percentage points fewer games than expected. For bettors and fantasy managers, this historical trend suggests extra caution when S Purkiss is appointed.

The Bias Meter™

Bias Level-30.7%

Bias AgainstNeutralFavorable

Match History

7 matches under this referee

Date	Opponent	Score	Result	Cards	Division
3 Feb 2024	Northampton(H)	4 - 1	WIN	🟨 1🟥 1	League One
25 Oct 2022	Oxford(H)	1 - 1	DRAW	🟨 1	League One
15 Mar 2022	Plymouth(A)	0 - 1	LOSS	🟨 2	League One
7 Dec 2021	Sheffield Weds(H)	0 - 0	DRAW	🟨 1	League One
9 May 2021	Accrington(H)	0 - 1	LOSS	🟨 4	League One
26 Jan 2021	Lincoln(H)	0 - 1	LOSS	🟨 2🟥 1	League One
19 Oct 2019	AFC Wimbledon(A)	0 - 1	LOSS	🟨 3	League One

Frequently Asked Questions

Detailed Statistics

Win Rate (Under Ref)14.3%

Baseline Win Rate45%

Bias Score-30.7%

Cards for Portsmouth

🟨 Yellows / Game2.00

🟥 Reds / Game0.29

Cards for Opponents

🟨 Opp Yellows / Game1.71

🟥 Opp Reds / Game0.29

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Betting Outlook

TIPSTER INSIGHT

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RED CARD RISK

Red card frequency: 0.29 per game

Higher than average dismissal rate in this matchup.

⚠️ This is statistical analysis, not betting advice. Gamble responsibly.

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