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Open Access Research article

A card game for the treatment of delusional ideas: A naturalistic pilot trial

Yasser Khazaal1*, Jérôme Favrod2, Joël Libbrecht3, Sophie Claude Finot4, Silke Azoulay5, Laetitia Benzakin6, Myriam Oury-Delamotte7, Christian Follack8 and Valentino Pomini2

Author Affiliations

1 Département de Psychiatrie, Echallens 9, CH-1004 Lausanne, Switzerland

2 Département de psychiatrie – Site de Cery – CH-1008 Prilly, Switzerland

3 Les Marronniers, Rue Despars 94, B-7500 Tournai, Belgium

4 Hôpital psychiatrique de Malévoz, CH-1870 Monthey, Switzerland

5 Centre Psychosocial, Chante-Merle 84, CH-2502 Biel, Switzerland

6 Hôpital Chalucet, F- 83000 Toulon, France

7 Hôpital St-Jean de Dieu, F-69008 Lyon, France

8 Hôpital psychiatrique de Marsens, CH-1633 Marsens, Switzerland

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BMC Psychiatry 2006, 6:48  doi:10.1186/1471-244X-6-48

Published: 30 October 2006



"Michael's game" is a card game which aims at familiarizing healthcare professionals and patients with cognitive behavioral therapy of psychotic symptoms. This naturalistic study tests the feasibility and the impact of the intervention in various naturalistic settings.


Fifty five patients were recruited in seven centers. They were assessed in pre and post-test with the Peters Delusion Inventory – 21 items (PDI-21).


Forty five patients completed the intervention significantly reducing their conviction and preoccupation scores on the PDI-21.


This pilot study supports the feasibility and effectiveness of "Michael's game" in naturalistic setting. Additional studies could validate the game in a controlled fashion.