This study examined the effects of a hypnosis intervention on the performance and flow state experiences of an elite European Tour male golfer. The experimental effect was assessed during 11 competitive golf events. Performance and flow data were analyzed using a single-subject design combined with a procedure to monitor the golfer's internal experience (Wollman, 1986) . The results indicated there were two overlapping data points between baseline and intervention for his performance score and

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... ne overlapping data point for his flow score. The qualitative data revealed hypnosis may help golfers self-regulate on the golf course during competition. Pates and Cowen are with the School of Culture and Lifestyle, University of Derby (Buxton), UK.