en روان شناسی تکاملی Evolutionary Psychology پژوهشي Original <div style="text-align: justify;"><span style="color:#3300ff;"><span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:2;"><b>Objective: </b>The present study aimed to determine the effectiveness of adolescent-centered mindfulness training on intolerance of uncertainty and rejection sensitivity in adolescent girls with social anxiety in Bandar Abbas.<br> <b>Methods</b>: This study employed a quasi-experimental design with a pretest, posttest, and one-month follow-up, including a control group. The statistical population consisted of all female students in the second cycle of secondary education in Bandar Abbas during the 2025&ndash;2026 academic year. The sample comprised 30 adolescent girls with social anxiety, selected using the Social Phobia Inventory (SPIN) based on a cut-off score of 20 from students across three public high schools in Bandar Abbas through purposive sampling, and randomly assigned to either an experimental group (<i>n</i> = 15) or a control group (<i>n</i> = 15). The experimental group received adolescent-centered mindfulness training based on the Mindfulness Skills Training Guide for Children and Adolescents (Burdick, translated by Manshaei et al., 2022) across ten 60-minute sessions, while the control group received no intervention. Data were collected using the Intolerance of Uncertainty Scale&ndash;12 (IUS-12) and the Rejection Sensitivity Questionnaire (RSQ) across three phases: pretest, posttest, and follow-up. Data were analyzed using repeated measures analysis of variance (ANOVA) in SPSS-26.<br> <b>Results</b>: The results indicated that adolescent-centered mindfulness training significantly reduced intolerance of uncertainty (<i>p</i> < .001) and rejection sensitivity (<i>p</i> < .001) in the experimental group compared to the control group. These effects were maintained at the one-month follow-up.<br> <b>Conclusions</b>: Adolescent-centered mindfulness training is an effective intervention for reducing intolerance of uncertainty and rejection sensitivity in adolescent girls with social anxiety.</span></span></span></span></div> Adolescent-centered mindfulness training, Intolerance of uncertainty, Rejection sensitivity, Social anxiety, Adolescents, Bandar Abbas 0 0 http://ieepj.hormozgan.ac.ir/browse.php?a_code=A-10-1252-1&slc_lang=en&sid=1 Ali Reza Shahi alirezashahi1370@gmail.com 100319475328460013726 0009-0004-3294-2577 Yes Department of Educational Psychology, BL.C., Islamic Azad University, Bandar Lengeh, Iran.