Previous research by Rachman and de Silva (1978, Behaviour Research and Therapy, 16, 233-248) and by Salkovskis and Harrison (1984, Behaviour Research and Therapy, 22, 549-552) has shown that abnormal and normal obsessions are similar in content. The present study examined whether the same is true for abnormal and normal rituals. A sample of normal subjects (N = 150) were asked about their idio...