National Institute of Mental Health in the context of "Mental age"

Spirit possession is an altered state of consciousness and associated behaviors purportedly caused by the control of a human body and its functions by spirits, ghosts, demons, angels, or gods. The concept of spirit possession exists in many cultures and religions, including Buddhism, Christianity, Dominican Vudú, Haitian Vodou, Hinduism, Islam, Judaism, Wicca, and Southeast Asian, African, and Native American traditions. Depending on the cultural context in which it is found, possession may be thought of as voluntary or involuntary and may be considered to have beneficial or detrimental effects on the host. The experience of spirit possession sometimes serves as evidence in support of belief in the existence of spirits, deities or demons. In a 1969 study funded by the National Institute of Mental Health, spirit-possession beliefs were found to exist in 74% of a sample of 488 societies in all parts of the world, with the highest numbers of believing societies in Pacific cultures and the lowest incidence among Native Americans of both North and South America. As Pentecostal and Charismatic Christian churches move into both African and Oceanic areas, a merger of belief can take place, with demons becoming representative of the "old" indigenous religions, which Christian ministers attempt to exorcise.

The International Affective Picture System (IAPS) is a database of pictures designed to provide a standardized set of pictures for studying emotion and attention that has been widely used in psychological research. The IAPS was developed by the National Institute of Mental Health Center for Emotion and Attention at the University of Florida. In 2005, the IAPS comprised 956 color photographs ranging from everyday objects and scenes − such as household furniture and landscapes − to extremely rare or exciting scenes − such as mutilated bodies and erotic nudes.

Mahlon Brewster Smith (June 26, 1919 – August 4, 2012) was an American psychologist and past president of the American Psychological Association. His career included faculty appointments at Vassar College, New York University, University of California, Berkeley, University of Chicago and University of California, Santa Cruz. Smith had been briefly involved with the Young Communist League as a student at Reed College in the 1930s, which resulted in a subpoena by the U.S. Senate in the 1950s. That activity caused him to be blacklisted by the National Institute of Mental Health for ten years without his knowledge.

Smith testified against segregation in schools as an expert witness in the Brown v. Board of Education case; the scope and scientific basis for Smith's testimony have been the subjects of controversy. He was the vice president of the Joint Commission on Mental Illness and Health, the group whose recommendations led to the deinstitutionalization of most of the mentally ill in the United States. In 1961, he helped to interview and select the first group of Peace Corps volunteers.