Josephus Henricus Maria Theresia (Jos) Dijkhuis (Borne, 20 February 1929 – Amsterdam, 4 June 2018) was a Dutch professor of clinical psychology and psychotherapy at the University of Utrecht.
Dijkhuis studied psychology in Utrecht after graduating from his gymnasium. In 1954 he became a scientific collaborator of the Institute of Clinical and Industrial Psychology, which was founded in 1949 by Prof. Jhr. dr. D.J. van Lennep. On 28 October 1960 he obtained his PhD at his alma mater with Van Lennep on Assessing psychology. In particular, assessing people and human behavior. He was then appointed as a lecturer at the same university with the task of teaching theory and practice of non-medical psychotherapy of adults; he held his public lecture under the title The Process of Interaction between Psychologist and Client. Among other things, he was involved in (mental) health care for students. On April 1, 1965, he was appointed full professor of clinical psychology and psychotherapy on behalf of psychologists and gave his inaugural address on November 1, 1965. On September 17, 1969, his teaching assignment was converted into clinical psychology and psychotherapy. In 1976, under his chairmanship, the Report of the committee charged with an investigation into the pedagogical and psychiatric policy of the Heldring foundations was published, after many complaints about abuses in those foundations had come out; nothing else happened with the report. However, the Dijkhuis Commission had not noticed anything about sexual abuse, although in a black book by an interest group that had already been detected in 1974. It was not until 1989 that the director, H.O.Th. Finkensieper, who allegedly abused power, was dismissed. In 1992, sexual abuse of pupils was sentenced to prison in one of the most notorious Dutch sexual offences cases. In 1987 he participated in a study day organized by the Catholic Study Center for Mental Health on the attitude of psychotherapists towards philosophy of life. In 1990 he contributed to the collection Applicable Psychotherapy. New insights and practices. He was also president of the Association for Psychotherapy. On March 1, 1994, he retired, but he gave his farewell speech on June 1, 1990 under the title The misunderstood individual: the decline in psychology of attention to the individual of people. In 1990 he published the article 'The CONO and the meta-study', in 1995 he collaborated on Dicht bij later. A more than informative book for people over fifty and in 2000 he contributed to the book Psychotherapy. Aspects and perspectives. Prof. J.H.M.T. Dijkhuis died in Amsterdam in 2018 at the age of 89.
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