The British Journal of Psychiatry (1969) 115: 787-790. doi: 10.1192/bjp.115.524.787
© 1969 The Royal College of Psychiatrists
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"Under-inclusion"—A Characteristic of Obsessional Personality Disorder: II

G. F. REED M.A., M.Litt., Ph.D.1

1 Senior Lecturer, Department of Psychology, University of Aberdeen

A group of ten patients suffering from obsessional personality (anankastic) disorder was compared with a matched control group of non-obsessional patients and with a matched normal control group. On a free sorting task with non-verbal material the anankastic group tended to over-define their categories and thus required more categories. This was discussed in relation to a central hypothesis and to classical clinical observations.

Submitted on December 3, 1968