TY - JOUR ID - 41139 TI - Study of Chronotype (Morningness-Eveningness) on Daily and Weekly Fluctuations of Preschool Children Aggression JO - Journal of Rehabilitation Sciences & Research JA - JRSR LA - en SN - 2345-6167 AU - Nasiri Zarch, Zohre AU - Sharifi, Massoud AU - Heidari, Mahmood AU - Pakdaman, Shahla AU - Raji, Hojatolla AD - Department of Psychology, Shahid Beheshti University, Tehran, Iran AD - Assistant professor of pediatric surgery, Shahid Sadoqi University of Medical Science, Yazd, Iran Y1 - 2018 PY - 2018 VL - 5 IS - 2 SP - 53 EP - 62 KW - Time merphology KW - Fluctuation KW - Preschool KW - Agression DO - 10.30476/jrsr.2018.41139 N2 - Background: The present study aimed at studying the morningness-eveningness chronotype (MEC) of daily and weekly biorhythm fluctuations in the aggression of preschool children. Methods: This was a causal-comparative study. The statistical population was preschool children in Tehran. One hundred children were selected through purposive sampling. They were examined at different times of day (08:00, 10:00, 13:00 and 15:00) and different days of the week (Saturday, Sunday, Monday, Tuesday and Wednesday). The data collection tool used was the MEC questionnaire for children, a behavioral questionnaire for preschool children and a self-report questionnaire about aggression. The data was analyzed using mixed ANOVA. Results: The results showed that the aggressive behavior of pre-school children in the educational environment varies throughout the day and week. Also, the aggressive performance of preschool children in the morning differed from that of mid-session children or evening-type children in the educational environment during the week (P<0.01). Conclusion: The results of the behavioral questionnaire showed that the effect of the group on the level of aggression was not significant, but the effect of the day of the week and time of day was significant. UR - https://jrsr.sums.ac.ir/article_41139.html L1 - https://jrsr.sums.ac.ir/article_41139_73720b5cc06146a308760b1070b468f4.pdf ER -