The role of autonomic arousal in problem gambling

The present study investigated the role of arousal in problem gambling. Three groups of subjects were recruited into the study corresponding to problem gamblers, high and low frequency social gamblers. For the two gambling groups, the preferred form of gambling was poker machine playing. Five different conditions were employed in order to determine under which conditions gambling related cues were related to increased autonomic arousal, as measured by skin conductance level (SCL), heart rate (HR) and frontalis electromyography (EMG). The five conditions were a neutral task, a videotaped poker machine gambling scenario presented with and without distraction, a personally relevant "win" situation and a videotaped horse race. Comparisons between responses for the videotaped poker machine gambling stimuli versus a horse-racing video task demonstrated differences only for the problem gambling group and only for SCL. No differences between these tasks emerged on the HR and EMG indices and no differences were evident for either of the social gambling groups. No changes were observed in any group when subject's cognitions were prevented by asking patients to count the number of wins made during the video play period while watching the same poker machine video. However, when personally relevant situations were presented and compared to a neutral task, differences were observed in all three groups. However, the nature of these differences varied between the groups and the different indices of arousal. For problem gamblers, increases were evident in all three measures. Increases were also observed for the control groups in comparison to the neutral task, but only in HR and SCL and not for EMG. For HR, the increases were equivalent across all three gambling groups. However, for SCL the problem gambling group became significantly more aroused than the control groups, but no differences were observed between the high and low frequency gamblers. Only the problem gambling groups evidenced significant increases in the personally relevant task compared to the neutral task for EMG. Theoretical and clinical implications of these results for the development, maintenance and treatment of problematic levels of gambling are discussed.