Objective Motivated by the need to push further our understanding of physicians' acceptance of clinical information systems, we propose a relatively new construct, namely, psychological ownership. We situated the construct within a nomological net using a prevailing and dominant IT adoption behavior model as a logical starting point.

Design A mail survey was sent to the population of users of a regional POE (Physician Order Entry) system aimed at speeding up the transmission of clinical data, mainly laboratory tests and radiology exams, within a community health network.

Measurements All scales, but one, were measured using previously validated instruments. For its part, the psychological ownership scale was developed using a multi-stage iterative procedure.

Results Ninety-one questionnaires were returned to the researchers, for a response rate of 72.8%. Our findings reveal that, in order to foster physicians' adoption of a clinical information system, it is important to encourage and cultivate a positive attitude toward using the new system. In this connection, positive perception of the technology' usefulness is crucial. Second, results demonstrate that psychological ownership for a POE system is positively associated with physicians' perceptions of system utility and system user friendliness. Last, through their active involvement and participation, physicians feel they have greater influence on the development process, thereby developing feelings of ownership toward the clinical system.

Conclusion Psychological ownership's highly significant associations with user participation and crucial beliefs driving technology acceptance behaviors among physicians affirm the value of this construct in extending our understanding of POE adoption.