|Karen Elizabeth Jefferson Petrie|
|Born||December 2, 1980|
|Institutions||University of Dundee|
|Alma mater||University of St Andrews, University of Huddersfield, University of Oxford|
|Thesis||Constraint Programming, Search and Symmetry (2005)|
|Doctoral advisor||Barbara Smith|
Karen Petrie is a British computer scientist specialising in the area of constraints programming. She was awarded young IT practitioner of the year by the British Computer Society (BCS) in 2004, for work she carried out whilst on placement at NASA. She is now on the staff of the University of Dundee.
She is a women in computing activist, who served as chair of BCSWomen from 2008-2011, and organised many events for women in computing during this period. Karen is responsible for an argument about sexist behaviour in gender-imbalanced groups called "The Petrie Multiplier"  which states that with a gender ratio of 1:r, women will receive r2 times as many sexist remarks as men.
- Dr Karen Petrie, School of Computing, University of Dundee.
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