Psychology, 2015, 6, 1223-1231 Published Online August 2015 in SciRes. http://www.scirp.org/journal/psych http://dx.doi.org/10.4236/psych.2015.610120 Development and Validation of a New Behavioral-Cognitive-Metacognitive Model for Explanation of SPD Masoud Nikfarjam1, Mehdi Rabiei2*, Amir Mohsen Rahnejat3, Kazem Khorramdel4 1Medical Plants Research Center, Shahrekord University of Medical Sciences, Shahrekord, Iran 2Department of Clinical Psychology, Baqiyatallah University of Medical Sciences, Tehran, Iran 3Department of Clinical Psychology, AJA University of Medical Science, Tehran, Iran 4Young Researcher and Elite Club, Electronic Branch, Islamic Azad University, Tehran, Iran Email: *
[email protected] Received 18 June 2015; accepted 2 August 2015; published 5 August 2015 Copyright © 2015 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/ Abstract The purpose of the present study is to provide an overview of the disorder and develop a new be- havioral-cognitive-metacognitive model to explain it. The present study is a descriptive-correla- tional research which uses the structural equation model. In this study, at first, a comprehensive and detailed explanation of skin picking disorder is presented. Then the conceptual model is pre- sented and finally, the model which is developed by using structural equation model is tested by Amos Graphics. The results of the structural equation model showed that the developed model in this study is able to explain skin picking disorder. Also the results of the overall fit indices for structural equation modeling show that the developed model has good fit to the sample data and is closely associated with the theoretical assumptions.