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A psychologist is a practitioner of psychology, the systematic investigation of the human mind, including behavior and cognition. In many countries, the title of psychologist is regulated by statute and licensing with the appropriate professional body is required. The American Psychological Association has issued a guideline that only those who hold a Ph.D. or Psy.D. degree in psychology or a closely related field should call themselves psychologists. Although the APA is influential in the realm of psychology worldwide, this guideline can be regarded, for those outside the U.S., as a suggestion, and in any case, significant contribution to psychology is the primary consideration here.
Entries in the list below who have "psychologist" in parentheses after their names are listed as such for disambiguation, that is, there is more than one person listed in Wikipedia by that name.
This category has the following 12 subcategories, out of 12 total.
The following 94 pages are in this category, out of 94 total. This list may not reflect recent changes (learn more).