Craig Haney is a University of California-Santa Cruz psychologist who for more than two decades has studied the effects of solitary confinement on inmates. During a 2013 interview for PBS’ Frontline program, Haney described what happens to people held under such deprivation. “Some prisoners react very negatively very quickly. They experience what has been termed ‘isolation panic,’ ” Haney told Frontline. “The experience of being in a cell by oneself, isolated in a place where other prisoners are isolated, facing the deprivation of social contact, is overwhelming for people, and some people react with extreme anxiety reactions in the very beginning of this process.