Shorter communication
Chronic nailbiting: a controlled comparison of competing response and mild aversion treatments

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Abstract

Recent studies have suggested that competing response, an abridged version of Azrin and Nunn's (1973) habit reversal method (Behaviour Research and Therapy, 11, 619–628), is a key component in the treatment of chronic nailbiting (Horne & Wilkinson, 1980, Behaviour Research and Therapy, 18, 287–291; Silber & Haynes, 1992, Behaviour Research and Therapy, 30, 15–22). This study replicated and extended the latter by adding an 8 week follow-up period and by using a non-student sample. Forty-five chronic nailbiter Ss were divided into three experimental groups. One method involved the use of mild aversion in which Ss painted a bitter substance on their nails. A second method required the subject to perform a competing response whenever they had the urge to nailbite or found themselves biting their nails. Both methods included self-monitoring of the behaviour and a third group of Ss performed self-monitoring alone as a control condition. The study lasted 12 weeks. Mild aversion resulted in significant improvements in nail length, with the competing response method just failing to show significance in this regard. There was no significant improvement for the control group. The implications for further study and the benefits of competing response in the light of these findings are discussed in terms of treatment success and use of therapist time.

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