Attention deficits and inflated perceptions of responsibility have been identified as characteristics of people with obsessive-compulsive disorder (OCD). The present study examined the relative importance of responsibility and attention in predicting non-clinical levels of obsessionality. Three hundred Australian university students were screened using the Maudsley Obsessional-Compulsive Inventory (MOCI), and students who scored in the top and bottom 10% of the distribution were selected for participation. The selected participants completed the Responsibility Attitude Scale (RAS) and the Test of Everyday Attention (TEA), along with measures of trait-anxiety and depression. High MOCI scorers exhibited a greater perception of responsibility, and poorer overall attention than low MOCI scorers. These differences remained significant after controlling for trait-anxiety and depression. Logistic regression analyses revealed that responsibility was a stronger predictor of non-clinical obsessionality than was attention. Moreover, attention did not make a significant contribution to the prediction of obsessionality once responsibility had been controlled. Correlations between responsibility and TEA visual selective attention subtests remained significant after controlling for obsessionality. These findings suggest that measures of attention (particularly measures of visual selective attention) may be confounded by responsibility attitudes, thus highlighting the importance of controlling for meta-cognitive variables such as responsibility when investigating attention in OCD.