en Clinical Psychology پژوهشي Research Article <span style="font-size:12px;"><span style="font-family:Tahoma;"><span style="line-height:normal"><span style="unicode-bidi:embed"><b><span style="color:black">Background and Objective:</span></b> <span style="color:#1f1f1f">Negative beliefs about self-compassion can lead to less motivation, less self-responsibility, and more self-indulgence. The present study was conducted to determine the psychometric properties of Persian version of Negative Self-Compassion Beliefs Scale (<a name="_Hlk218356688">NSCB-S</a>) among overweight people. </span></span></span><br> <span style="line-height:normal"><span style="unicode-bidi:embed"><b><span style="color:black">Materials and Methods:</span></b> <span style="color:#1f1f1f">A total of 207 overweight people (149 women and 58 men) were selected through purposeful sampling method from June 2025 to September 2025. Data were analysed by Lisrel 8.5 and SSPS (version 22). Construct validity was assessed via confirmatory factor analysis. Convergent and divergent validity of <a name="_Hlk218289201">the NSCB-S </a>were evaluated using correlating Physical Appearance Perfectionism, Positive and Negative Affect, Self-Compassion, Fear of Compassion, and Self-Criticism. </span></span></span><br> <span style="line-height:normal"><span style="unicode-bidi:embed"><b><span style="color:black"><span style="letter-spacing:.1pt">Results:</span></span></b> <span style="color:#1f1f1f">The single factor model of NSCB-S was approved among Iranian overweight people. Furthermore, the NSCB-S was positively correlated with Physical Appearance Perfectionism, Fear of Compassion, Self-Criticism and Negative Affect, and negatively correlated with Positive Affect and Self-Compassion. In addition, the scale exhibited good internal consistency, with a Cronbach&rsquo;s alpha of 0.93. </span></span></span></span><br> <span style="line-height:normal"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif"><span style="font-family:Tahoma;"><b><span style="color:black">Conclusions:</span></b> </span><span style="font-family:Optima"><span style="color:#1f1f1f"><span style="font-family:Tahoma;">Results demonstrated that the NSCB-S has proper and acceptable validity and reliability among Iranian overweight people.</span> </span></span></span></span></span></span><br> &nbsp; Negative self-compassion beliefs, Obesity, Overweight, Self-compassion 166 171 http://ajnpp.umsha.ac.ir/browse.php?a_code=A-10-2011-1&slc_lang=en&sid=1 Sahar Rafiee Sahar.rafiee@gmail.com 10031947532846008791 10031947532846008791 No Department of Psychology, Razi University, Kermanshah, Iran. khodamorad Momeni kh.momeni@razi.ac.ir 10031947532846008792 10031947532846008792 Yes Faculty of Social Sciences, Department of Psychology, Razi University, Kermanshah, Iran. kamran Yazdanbakhsh k.yazdanbakhsh@razi.ac.ir 10031947532846008793 10031947532846008793 No Faculty of Social Sciences, Department of Psychology, Razi University, Kermanshah, Iran. aliakbar Foroughi foroughi_2002@yahoo.com 10031947532846008794 10031947532846008794 No Department of Clinical Psychology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.