Browsing Faculté des arts et des sciences by Author "Ouellet-Morin, Isabelle"
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Does cortisol moderate the environmental association between peer victimization and depression symptoms? a genetically informed twin study
Brendgen, Mara; Ouellet-Morin, Isabelle; Girard, Alain; Lupien, Sonia; Vitaro, Frank; Dionne, Ginette; Boivin, Michel (Elsevier, 2017-10-31)Many youths who are victimized by peers suffer from depression symptoms. However, not all bullying victims become depressed and individuals’ biological sensitivity may play an important moderating role in this regard. In line with this notion, peer ... -
Environmental influence of problematic social relationships on adolescents' daily cortisol secretion : a monozygotic twin-difference study
Brendgen, Mara; Ouellet-Morin, Isabelle; Girard, Alain; Lupien, Sonia; Vitaro, Frank; Dionne, Ginette; Boivin, Michel (Cambridge University Press, 2017-02)BACKGROUND: This study investigated the potential environmental effects of peer victimization and the quality of relationships with parents and friends on diurnal cortisol secretion in mid-adolescence. METHOD: This study used the monozygotic ... -
Evidence of a unique and common genetic etiology between the CAR and the remaining part of the diurnal cycle : a study of 14 year-old twins
Ouellet-Morin, Isabelle; Brendgen, Mara; Girard, Alain; Dionne, Ginette; Lupien, Sonia; Vitaro, Frank; Boivin, Michel (Elsevier, 2016-04)Introduction By and large, studies have reported moderate contributions of genetic factors to cortisol secreted in the early morning and even smaller estimates later in the day. In contrast, the cortisol awakening response (CAR) has shown much ... -
Impact of a social skills program on children’s stress : a cluster randomized trial
Larose, Marie-Pier; Ouellet-Morin, Isabelle; Vitaro, Frank; Geoffroy, Marie-Claude; Ahun, Marilyn N.; Tremblay, Richard Ernest; Côté, Sylvana (Elsevier, 2019-02-21)Background: Most preschool children in Western industrialized countries attend child care during the day while parents work. Studies suggest that child care may be stressful to young children, perhaps because they still lack the social skills to interact ... -
Interactive effects of early and recent exposure to stressful contexts on cortisol reactivity in middle childhood
Jaffee, Sara R.; McFarquhar, Tara; Stevens, Suzanne; Ouellet-Morin, Isabelle; Melhuish, Edward; Belsky, Jay (Wiley, 2015)Background: Given mixed findings as to whether stressful experiences and relationships are associated with increases or decreases in children’s cortisol reactivity, we tested whether a child’s developmental history of risk exposure explained variation ... -
Intimate partner violence and new-onset depression : a longitudinal study of women's childhood and adult histories of abuse
Ouellet-Morin, Isabelle; Fisher, Helen L.; York-Smith, Marianna; Fincham-Campbell, Stephanie; Moffitt, Terrie E.; Arseneault, Louise (Wiley-Liss, 2015-05)Background—Studies indicate that women victims of intimate partner violence are at increased risk for poor mental health. This research disentangled the effect of partner violence on new-onset depression and psychosis spectrum symptoms from effects of ... -
The Quebec newborn twin study at 21
Boivin, Michel; Brendgen, Mara; Dionne, Ginette; Ouellet-Morin, Isabelle; Dubois, Lise; Robaey, Philippe; Tremblay, Richard Ernest; Vitaro, Frank (Cambridge University Press, 2019-10-21)This paper is a revised and updated edition of a previous description of the Quebec Newborn Twin Study (QNTS), an ongoing prospective longitudinal follow-up of a birth cohort of twins born between 1995 and 1998 in the greater Montreal area, Québec, ... -
Validation of an adapted procedure to collect hair for cortisol determination in adolescents
Adaption of the collection protocol for hair cortisol determination
Ouellet-Morin, Isabelle; Laurin, Mélissa; Robitaille, Marie-Pier; Brendgen, Mara; Lupien, Sonia; Boivin, Michel; Vitaro, Frank (Elsevier, 2016-08)Introduction In the last decades, cortisol has been extensively studied in association to early exposure to adversity as well as in the etiology of a number of physical and mental problems. While saliva and blood samples allow the measurement of ...