Jeffrey Alan Lieberman (born 1948) is an American psychiatrist who specializes in schizophrenia and related psychoses and their associated neuroscience (biology) and pharmacological treatment (psychiatric drugs).

He was principal investigator for CATIE, the largest and longest independent study ever funded by the United States National Institute of Mental Health to examine existing pharmacotherapies for schizophrenia.

[citation needed] His research has been supported by grants from the National Institutes of Health and the NARSAD, Stanley, and Mental Illness Foundations.

[citation needed] Lieberman served as principal investigator for Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE) sponsored by the National Institute of Mental Health (NIMH).

[citation needed] On February 21, 2022, Lieberman posted on Twitter about Nyakim Gatwech, an Ethiopian-born American model of South Sudanese descent, stating that "Whether a work of art or freak of nature she's a beautiful sight to behold", leading to criticism from students and colleagues.

[8] Elwood Watson, a professor at East Tennessee State University, said the post fit within a centuries-long history of the dehumanization of people of African descent.

A four-part series, tentatively titled "In Search of Madness: The Untold Story of Mental Illness," based on his book, Shrinks, is scheduled for broadcast on PBS in April 2022.

[24][25][26] Lieberman also published his and seven colleagues' analysis of the president's mental state based on public information; they ruled out a series of diagnoses as unlikely and said incipient dementia was "most plausible", but concluded that Trump would have to allow for a full medical examination for any conclusions to be drawn.