KMAN Publication Inc. (KMANPUB) Journal of Adolescent and Youth Psychological Studies (JAYPS) 2981-2526 6 Serial Number 32 2025 04 10 The Effectiveness of Lazarus Multimodal Psychotherapy on Experiential Avoidance and Rumination in Adolescent Girls with Gastrointestinal Disorders in Isfahan The Effectiveness of Lazarus Multimodal Psychotherapy on Experiential Avoidance and Rumination in Adolescent Girls with Gastrointestinal Disorders in Isfahan 108 116 10.61838/kman.jayps.6.4.12 EN Journal Article 2025 01 23 <table> <tbody> <tr> <td> <p><strong>Objective:</strong> The present study aimed to examine the effectiveness of Lazarus multimodal therapy on experiential avoidance and rumination in adolescent girls with gastrointestinal disorders in Isfahan.</p> <p><strong>Methods and Materials:</strong> This study employed a quasi-experimental design with a pretest-posttest control group. The statistical population included all adolescent girls with gastrointestinal disorders in Isfahan. The sample consisted of thirty adolescent girls selected through convenience sampling and non-randomly assigned to experimental and control groups. While the control group was placed on a waiting list, the experimental group received Lazarus multimodal therapy interventions over eight 90-minute training sessions. Both groups were assessed in the pretest and posttest stages using the study instruments. These instruments included the Experiential Avoidance Questionnaire (Gamez et al., 2011) and the Rumination Questionnaire (Nolen-Hoeksema &amp; Morrow, 1991). The collected data were analyzed using descriptive statistics (mean and standard deviation) and inferential statistics (repeated measures analysis of variance).</p> <p><strong>Findings:</strong>  The results indicated that this method effectively improved both psychological constructs (p&lt;0.01).</p> <p><strong>Conclusion:</strong> Based on these findings, it can be concluded that this approach was effective in reducing experiential avoidance and rumination in adolescent girls with gastrointestinal disorders.</p> </td> </tr> </tbody> </table> <p> </p> https://journals.kmanpub.com/index.php/jayps/article/download/3772/6859