Martin E. P. "Marty" Seligman is an American psychologist, educator, and author of self-help books. Since the late 1990s, Seligman has been an avid promoter within the scientific community for the field of positive psychology. His theory of learned helplessness is popular among scientific and clinical psychologists. A Review of General Psychology survey, published in 2002, ranked Seligman as the 31st most cited psychologist of the 20th century.
Gordon Willard Allport was an American psychologist. Allport was one of the first psychologists to focus on the study of the personality, and is often referred to as one of the founding figures of personality psychology. He contributed to the formation of values scales and rejected both a psychoanalytic approach to personality, which he thought often was too deeply interpretive, and a behavioral approach, which he thought did not provide deep enough interpretations from their data. He emphasized the uniqueness of each individual, and the importance of the present context, as opposed to past history, for understanding the personality.
Howard Earl Gardner is an American developmental psychologist and the John H. and Elisabeth A. Hobbs Professor of Cognition and Education at the Harvard Graduate School of Education at Harvard University. He is currently the senior director of Harvard Project Zero, and since 1995, he has been the co-director of The Good Project.
Phillip Calvin McGraw , known as Dr. Phil, is an American television personality, author, psychologist, and the host of the television show Dr. Phil, which debuted in 2002. McGraw first gained celebrity status with appearances on The Oprah Winfrey Show in the late 1990s. In 2015, Forbes listed his earnings at $70 million for the previous 12 months, and ranked him the 15th highest earning celebrity in the world.
Albert Ellis was an American psychologist who in 1955 developed Rational Emotive Behavior Therapy . He held MA and PhD degrees in clinical psychology from Columbia University and the American Board of Professional Psychology . He also founded and was the President of the New York City-based Albert Ellis Institute for decades. He is generally considered to be one of the originators of the cognitive revolutionary paradigm shift in psychotherapy and one of the founders of cognitive-behavioral therapies.