In 1989, Dr. Steven Phillipson coined the term "Pure-O" in his groundbreaking article Thinking the Unthinkable. Pure-O is the subset of OCD whereby sufferers engage in non-observable rituals to escape, avoid or undo the emotional distress associated with intrusive thoughts (e.g. spikes).



Articles on Pure-O



Thinking the Unthinkable 



Rethinking the Unthinkable 








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To Contact Dr. Phillipson:

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Fax: (212) 686-0943​