Shahid Beheshti University Journal of Family Research 1735-8442 13 3 2018 02 20 Family Triad Systemic Scale: An Instrument for Assessment of Relationships between Couple and Families of Origin Family Triad Systemic Scale: An Instrument for Assessment of Relationships between Couple and Families of Origin 343 360 97571 FA Mona Cheraghi Shahid Beheshti University 0000-0002-8830-8370 Mohammad Ali Mazaheri Shahid Beheshti University 0000-0001-8638-2641 Fereshteh Mootabi Shahid Beheshti University Leyli Panaghi Shahid Beheshti University 0000-0002-2066-4686 Mansoureh Sadat Sadeghi Shahid Beheshti University 0000-0001-9968-1018 Khadijeh Salmani Alborz University of Medical Sciences Journal Article 2017 04 05 Because of noticeable role of relationships with in-laws in prediction of marital adjustment and satisfaction in Iran, it is necessary to provide an instrument based on Family Triad Systemic Model (FTSM) to assess the relationships between couple and two original families. The objective of present study was providing the instrument and checking the psychometric properties of it. An item pool (107 items) was created by using other related tools, interviews by experts and married people. Then 425 participants selected through accessible sampling method conducted the questionnaire. By Principal Component Analysis and Varimax rotation three factors (we-ness, boundaries, joining in-laws) were extracted supporting the FTSM. Three factor model could explain 47.27% of total variance. Face validity of instrument was examined by eight experts. The Intraclass Correlation Coefficients for we-ness, boundaries and joining the in-laws were: 0.84, 0.81, 0.86 (p Because of noticeable role of relationships with in-laws in prediction of marital adjustment and satisfaction in Iran, it is necessary to provide an instrument based on Family Triad Systemic Model (FTSM) to assess the relationships between couple and two original families. The objective of present study was providing the instrument and checking the psychometric properties of it. An item pool (107 items) was created by using other related tools, interviews by experts and married people. Then 425 participants selected through accessible sampling method conducted the questionnaire. By Principal Component Analysis and Varimax rotation three factors (we-ness, boundaries, joining in-laws) were extracted supporting the FTSM. Three factor model could explain 47.27% of total variance. Face validity of instrument was examined by eight experts. The Intraclass Correlation Coefficients for we-ness, boundaries and joining the in-laws were: 0.84, 0.81, 0.86 (p https://jfr.sbu.ac.ir/article_97571_223ce4e1cbffaba831683d8a48feb658.pdf