Th Psychological CorporationFollowing a distinguished academic and scientific publishing career, James McKeen Cattell, Ph.D., established The Psychological Corporation in New York City in 1921. Dr. Cattell was a former president of the American Psychological Association, the first psychologist elected to the National Academy of Sciences, and founder and editor of Scientific Monthly.

He joined forces with two former graduate students, Robert Sessions Woodworth and Edward Lee Thorndike. Both were eminent psychologists, and Thorndike was regarded as the foremost authority on the analysis and measurement of learning. The three men started a business to market psychological tests and related materials to educational, corporate and government clients. Dr Cattell’s plan was to form a holding company and referral service for psychologists, giving them shares of stock in exchange for their willingness to administer individual intelligence tests and promote the research and development of applied psychology. Half of the fees the psychologists received were to be put toward psychological research.

So great was Dr. Cattell's influence that he was able to recruit almost half of the 400 APA members for his corporation. Offices were opened in New York City's Grand Central Terminal, with the goal of locating and maintaining branch offices throughout the United States and abroad. Dr. Cattell served as president of The Psychological Corporation until late 1926, when he was named Chairman of the Board and replaced as president by Walter Van Dyke Bingham, a psychologist with more than 10 years of experience in industrial psychology.

In 1939, the company published the Wechsler-Bellevue Intelligence Scales. In 1960, two other growing textbook and educational test publishing companies, Harcourt Brace & Company and World Book Company, merged to become Harcourt Brace & World (later known as Harcourt Brace Jovanovich). In 1970, this firm purchased The Psychological Corporation, merging the HB&W test educational testing division into the newly acquired company.  The company headquarters moved again, this time to its present location in San Antonio, Texas. 

In the late 1980s and early 1990s, The Psychological Corporation acquired the Merrill Publishing Company Test Division (1986), Cognitronics Corporation (1993), Communication Skill Builders/Therapy Skill Builders (1994), and Assessment Systems, Inc. (1995).

In late 2003 we created Harcourt Assessment.

On 4th May 2007, Pearson agreed to acquire Harcourt Assessment and Harcourt Education International from Reed Elsevier.

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