History of the House-Tree-Person
The House-Tree-Person (HTP) was first developed by John Buck in 1948 and then updated in 1969. It was originally based on the Goodenough scale which was used to assess intellectual functioning. The HTP is usually used with children, and they are instructed to draw a house, tree, and person on three pieces of plain white paper. Buck believed that through these drawings, the client's unconscious difficulties would be objectified.
Reliability and Validity Factors
There is little evidence that shows that the HTP is reliable and valid. The HTP is mostly subjective so it is nearly impossible for different therapists to interpret the drawings in the same way and reach the same conclusion. There are some studies that show that HTP can accurately measure brain damage, and is used in assessing schizophrenic patients who suffer from brain damage.
Where to Obtain and Cost
The HTP is available at this website: <http://www.wpspublish.com/store/p/2796/house-tree-person-h-t-p-projective-drawing-technique>. The kit costs $215.50 and includes a copy of "The House-Tree-Person Projective Drawing Technique: Manual and Interpretive Guide", a copy of "House-Tree-Person Drawings: An Illustrated Diagnostic Handbook", a copy of Catalog for the Qualitative Interpretation of the House-Tree-Person (H-T-P), 25 H-T-P interpretation booklets, and 25 H-T-P drawing forms. All of the parts of this kit can be purchased individually in case more booklets or forms are needed.
Administration and Interpretation
As mentioned above, the HTP is usually administered to children and adolescents because it requires the client to draw pictures. It takes approximately 150 minutes to complete, although it does depend on the person (i.e. an adult may finish more quickly, or a neurologically impaired individual may take longer). Clients are given the task of drawing a house, a tree, and a person on three pieces of paper, and will be asked a series of questions about the drawings. There are 60 questions in the interpretation catalog (available in the HTP kit above), but the administrator can come up with their own follow-up questions. Based on the drawings and the the answers to the questions, the counselor or therapist can interpret what is going on with the client, although different counselors/therapists will come up with varying interpretations.
Article
Li, X., Cao, B., Yang, W., Qi, J., Liu, J., & Wang, Y. (2014). Characteristic of the synthetic house-tree-person test in children with high-functioning autism. Chinese Mental Health Journal,28(4), 260-266.
Image
Sample House-Tree-Person
References
Encyclopedia of Mental Disorders. (2014). House-tree-person test. Retreived from http://www.minddisorders.com/Flu-Inv/House-tree-person-test.html
Niolon, R. (2003). House tree person drawings. Retrieved from http://www.intelligentietesten.com/house_tree_person_drawings.htm
WPS: Unlocking Potential. (2014). House-tree-person (H-T-P) projective drawing technique. Retrieved from http://www.wpspublish.com/store/p/2796/house-tree-person-h-t-p-projective-drawing-technique
Niolon, R. (2003). House tree person drawings. Retrieved from http://www.intelligentietesten.com/house_tree_person_drawings.htm
WPS: Unlocking Potential. (2014). House-tree-person (H-T-P) projective drawing technique. Retrieved from http://www.wpspublish.com/store/p/2796/house-tree-person-h-t-p-projective-drawing-technique
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