en عمومى General پژوهشي Research <span style="font-size:14px;"><span style="font-family:Times New Roman;"><span style="line-height:normal"><b>Purpose:</b> the purpose of this study was to investigate the effectiveness of self - awareness training based on the approach of the internal family system (IFS) on perceived stress among first high school girl students with test anxiety in the Khomeini Shahr city. Method: the research method is semi - experimental with pre - test - post -test. The statistical population of the study included all the high school girl students of the first grade at 2021 - 2020 in the Khomeini Shahr city, which is suffering from test anxiety. For this purpose, 30 first high school girl students who had higher anxiety according to Friedman test anxiety test were selected through purposive sampling and answered to standard questionnaires of perceived stress by Cohen, Cemark and Mermestline (1983) and Shnyder and Peterson (2000). Then, they were randomly divided into two experimental ( n = 15 ) and control ( n = 15 ) groups.</span><br> <span style="line-height:normal"><b>Results:</b> the experimental group attended training sessions based on the internal family system (IFS) as 8 sessions of 1.5 hour, but the control group received no intervention. The data were analyzed by covariance analysis. </span><br> <span style="line-height:normal"><b>Conclusion:</b> the results showed that the effect of self - awareness training based on the internal family system approach (IFS) has significant effect on perceived stress ( effect size 0.17, p >0. 05)&nbsp; and test anxiety( the effect size of 0.56,P<0.01) in first high school girl with test anxiety in Khomeini Shahr city.<span lang="EN"><span style="font-family:"Cambria",serif"></span></span></span></span></span><br> &nbsp; Self - awareness training, Internal family system approach (IFS), Perceived stress, Test anxiety 0 0 http://intjmi.com/browse.php?a_code=A-10-1-719&slc_lang=en&sid=1 Mitra Shafaf mytrashfaf19@gmail.com 10031947532846008581 10031947532846008581 Yes M.A. in Positive Psychology (Islamic Psychology), Payame Noor University of Natanz, Isfahan, Iran. Azam Salehi 10031947532846008582 10031947532846008582 No Department of Educational Sciences and Psychology, Payame Noor University, Tehran, Iran.