Developing a Scoring System & Establishing the Psychometric Properties of the Kinetic House_Tree_Person test in Iranian Culture

The Kinetic House-Tree-Person-Test is among the ten widely used psychological assessment measures. It could cast light on some preconscious and unconscious aspects of personality. However, lack of scientific evidence regarding its psychometric properties is the primary challenge for its administration. The current study aimed at providing a scoring system for this drawing test, which could help us evaluate its validity and reliability. To develop a scoring system , first 558 indicators were extracted from our reliable sources of drawing test interpretation and based on main scales as well as subscales of the Revised NEO Personality Inventory (NEO-PIR), according to the fourfold symbols. (general, person, tree and house). The scoring was done using Rasch’s measurement model. Then, 130 participants (65 females and 65 males, admitted to a consultation clinic in Tehran, were selected. The validity of the test was evaluated concurrently with the of the Revised NEO Personality Inventory. The reliability was evaluated by re-testing 29 participants with the same drawing test in two weeks. Reliability of the indicators for emotional instability, extraversion, greeableness and consciousnesness was acceptable and meaningful. Cronbach’s Alpha coefficients for five factors were all high and meaningful at 0.01 level. The variability test using a concurrent administration with the NEO-PIR, showed that 70% of indicators were meaningfully valid. The scores of males and females were different in some scales. The results of the study indicated high reliability and validity for the Kinetic Home-Tree Person-test as well as some local and cultural variabilities among. Indicators.