DxR Clinician delivers proven, full featured, professionally edited cases used with patient simulation software tools in a convenient Web-based format. DxR Clinician features everything needed to teach, learn, and evaluate key clinical reasoning skills. DxR Clinician is a complete computer simulation package consisting of prepared patient cases, management tools (for setting the evaluation criteria, analyzing student records, and enriching the program with learning resources and content questions), and authoring tools (for developing new cases). DxR Clinician was developed because healthcare professionals face the difficult task of determining the clinical reasoning skills of individual students. The procedure of observing and mentoring students during preclinical patient encounters and clinical clerkships provides considerable insights into the clinical reasoning procedure but does not provide any means of quantifying the specific skills. DxR Clinician software, on the other hand, does have the ability to monitor each action of the student during the "patient" encounter and provide feedback about the level of clinical reasoning demonstrated.