Human social cognition relies to some degree on the ability to attribute actions to their proper agents and the ability to understand the meaning of actions when they are performed by others. Some of the symptoms of psychiatric diseases such as schizophrenia have been suggested to result from an impaired awareness of one's own actions and to a disrupted ability to recognize the actions of others. It therefore follows that studying the performance of these patient groups may lead to a greater understanding of agency—the attribution of actions. Daprati et al., 1997 Daprati E. et al. Looking for the agent: an investigation into consciousness of action and self-consciousness in schizophrenic patients. Cognition. 1997; 65: 71-86 Crossref PubMed Scopus (396) Google Scholar studied the ability of schizophrenic subjects, with and without delusion of control, to perform simple finger and wrist movements in the absence of direct visual control of their hand. Using a sophisticated video and mirror arrangement, subjects were shown a real-time image of either their own gloved hand performing the movement, or an alien gloved hand performing either the same movement or a different movement. The subjects' task was to discriminate their own hand movement. The results indicated that the delusional and hallucinating schizophrenic subjects were less able to discriminate their own hand from alien hands when compared with non-hallucinating subjects. They also had a tendency to attribute mistakenly an alien hand as their own. These results are consistent with reports that hallucinating subjects are likely to incorporate external events into their perception of their own experience, and are discussed in the context of the cues that are used to produce conscious judgements regarding the origin of actions.