OUTLINE: Patients are interviewed over the phone to evaluate their perceptions, motivations, and expectations of phase I clinical trials. Patients complete a questionnaire comprising 24 questions over 30-45 minutes. Interviews are conducted within 1 week after enrolling in a phase I clinical trial (prior to the first dose of study agent) and then again 2 months later (or at the time the patient stops treatment). The first 10 patients enrolled complete an additional 6 questions over 15 minutes during the first interview to validate the questionnaire, but do not complete a second interview.