 In 1970, Harcourt Brace Jovanovich acquired The Psychological Corporation and, in 1976, merged its educational testing department, acquired from World Book Company in 1960, into The Psychological Corporation.In the 1980s and 1990s, The Psychological Corporation (TPC) expanded through a number of acquisitions.In 1986, the company acquired Merrill Publishing's test division with its portfolio of tests for language, speech and hearing.