en روان شناسی تکاملی Evolutionary Psychology پژوهشي Original <div style="text-align: justify;"><span style="color:#0000FF;">The purpose of this study was to investigate the relationship between personality characteristics of single-parent, two-parent and multi-parent families with their parent-child relationship in Sari. In a correlational study, 324 high school male and female high school students in Sari were selected by simple random sampling and completed the NEO 5-Factor Personality Questionnaire and Parent-Child Relationship Questionnaire (PCRS). The data was analyzed by SPSS software using descriptive statistics and linear regression. The results showed that personality traits explained 49.5% variance of father-child relationship in single-parent families, 25.4% variance of father -child relationship in two-child families and 26.3% variance of father -child relationship in multi-child families (p < 0.01). Furthermore, the results indicated that personality traits explained 20.8 % variance of mother-child relationship in single-parent families, 36.9% variance of mother-child relationship in two-child families and 32.7% variance of mother-child relationship in multi-child families (p < 0.01). &nbsp;Therefore, personality traits of students are effective in explaining the parent-child relationship of families<span dir="RTL">.</span></span></div> Personality Traits, Parent-Child Relationship, Single-Child, Two-Child, Multiple-Child, Students. 24 32 http://ieepj.hormozgan.ac.ir/browse.php?a_code=A-10-127-5&slc_lang=en&sid=1 Ziba Sherafati 10031947532846001177 10031947532846001177 No PhD Student, Department of Psychology, Marvdasht Branch, Islamic Azad University, Marvdasht Amir Hoshang Mehryar 10031947532846001178 10031947532846001178 Yes Professor, Department of Psychology, Marvdasht Branch, Islamic Azad University, Marvdasht Mohammad Khayyer 10031947532846001179 10031947532846001179 No Professor, Department of Psychology, Marvdasht Branch, Islamic Azad University Hojatollah Javidi 10031947532846001180 10031947532846001180 No Associate Professor, Department of Psychology, Marvdasht Branch, Islamic Azad University, Marvdasht