WASHINGTON — Medical professionals who were involved in the Central Intelligence Agency’s interrogations of terrorism suspects engaged in forms of human research and experimentation in violation of medical ethics and domestic and international law, according to a new report from a human rights organization.

Doctors, psychologists and other professionals assigned to monitor the C.I.A.’s use of waterboarding, sleep deprivation and other “enhanced” interrogation techniques gathered and collected data on the impact of the interrogations on the detainees in order to refine those techniques and ensure that they stayed within the limits established by the Bush administration’s lawyers, the report found. But, by doing so, the medical professionals turned the detainees into research subjects, according to the report, which is scheduled to be published on Monday by Physicians for Human Rights.

The data collected by medical professionals from the interrogations of detainees allowed the C.I.A. to judge the emotional and physical impact of the techniques, helping the agency to “calibrate the level of pain experienced by detainees during interrogation, ostensibly to keep it from crossing the administration’s legal threshold of what it claimed constituted torture,” the report said. That meant that the medical professionals crossed the line from treating the detainees as patients to treating them as research subjects, the report asserted.

The fact that psychologists, doctors and other health professionals were involved in the interrogations conducted by the C.I.A. and the Defense Department has been previously reported. A confidential report about the issue by the International Committee of the Red Cross, based on interviews with several high-value detainees held by the C.I.A., was leaked to the news media last year.