Richard E Tremblay

Tomsk State University, Tomsk, Tomsk, Russia

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Publications (531)1723.58 Total impact

  • F. Vitaro · M. Brendgen · A. Girard · G. Dionne · R. E. Tremblay · M. Boivin

    No preview · Article · Feb 2016 · International Journal of Behavioral Development
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    ABSTRACT: There is a lack of evidence pointing to specific dietary elements related to weight gain and obesity prevention in childhood and adulthood. Dietary intake and obesity are both inherited and culturally transmitted, but most prospective studies on the association between diet and weight status do not take genetics into consideration. The objective of this study was to document the association between dietary intake at 9 years and subsequent Body Mass Index (BMI) in adolescent monozygotic boy and girl twin pairs. This research used data from 152 twin pairs. Dietary data were collected from two 24-hour-recall interviews with a parent and the child aged 9 years. Height and weight were obtained when the twins were aged 9, 12, 13, and 14 years. Intrapair variability analysis was performed to identify dietary elements related to BMI changes in subsequent years. BMI-discordant monozygotic twin pairs were also identified to analyze the dietary constituents that may have generated the discordance. After eliminating potential confounding genetic factors, pre-adolescent boys who ate fewer grain products and fruit and consumed more high-fat meat and milk had higher BMIs during adolescence; pre-adolescent girls who consumed more grain products and high-fat meat and milk had higher BMIs during adolescence. Energy intake (EI) at 9 years was not related to BMI in subsequent years. Our study suggests that messages and interventions directed at obesity prevention could take advantage of sex-specific designs and‚ eventually‚ genetic information.
    No preview · Article · Feb 2016 · Twin Research and Human Genetics

  • No preview · Article · Feb 2016
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    ABSTRACT: The aim of this study was to examine whether short sleep duration is associated with poor receptive vocabulary at age 10 years. In the Quebec Longitudinal Study of Child Development, parents reported their children's nocturnal sleep duration annually from ages 2.5 to 10 years, and children were assessed for receptive vocabulary using the Peabody Picture Vocabulary Test—Revised (PPVT-R) at ages 4 and 10 years. Groups with distinct nocturnal sleep duration trajectories were identified and the relationships between sleep trajectories and poor PPVT-R performance were characterized. In all, 1192 children with available sleep duration and PPVT-R data participated in this epidemiological study. We identified four longitudinal nocturnal sleep trajectories: short persistent sleepers (n = 72, 6.0%), short increasing sleepers (n = 47, 3.9%), 10-h sleepers (n = 628, 52.7%) and 11-h sleepers (n = 445, 37.3%). In all, 14.8% of the children showed poor PPVT-R performance at age 10 years. Nocturnal sleep trajectories and poor PPVT-R performance at age 10 were associated significantly (P = 0.003). After adjusting for baseline receptive vocabulary performance at age 4 and other potential confounding variables, logistic regression analyses suggest that, compared to 11-h sleepers, the odds ratio of presenting poor receptive vocabulary at age 10 was 2.67 [95% confidence interval (CI): 1.24–5.74, P = 0.012] for short persistent sleepers and 1.66 (95% CI: 1.06–2.59, P = 0.026) for 10-h sleepers. These results corroborate previous findings in early childhood, and indicate that short sleep duration is associated with poor receptive vocabulary during middle childhood.
    No preview · Article · Jan 2016 · Journal of Sleep Research
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    ABSTRACT: Objective: To determine if child-care services (CCS) at a population level can reduce social inequalities in academic performance until early adolescence. Methods: A 12-year population-based prospective cohort study of families with a newborn (n = 1269). Two CCS variables were estimated: "intensity" (low, moderate, and high number of hours) and "center-based CCS type" (early onset, late onset, and never exposed to center-based CCS). Results: Children from low socioeconomic status (SES) families who received high-intensity CCS (any type), compared with those who received low-intensity CCS, had significantly better reading (standardized effect size [ES] = 0.37), writing (ES = 0.37), and mathematics (ES = 0.46) scores. Children from low-SES families who received center-based CCS, compared with those who never attended center care, had significantly better reading (ESearly onset = 0.68; ESlate onset = 0.37), writing (ESearly onset = 0.79), and mathematics (ESearly onset = 0.66; ESlate onset = 0.39) scores. Furthermore, early participation in center-based CCS eliminated the differences between children of low and adequate SES on all 3 examinations (ES = -0.01, 0.13, and -0.02 for reading, writing, and mathematics, respectively). These results were obtained while controlling for a wide range of child and family variables from birth to school entry. Conclusions: Child care services (any type) can reduce the social inequalities in academic performance up to early adolescence, while early participation in center-based CCS can eliminate this inequality. CCS use, especially early participation in center-based CCS, should be strongly encouraged for children growing up in a low-SES family.
    Full-text · Article · Dec 2015 · Pediatrics
  • Julian Chiarella · Richard E Tremblay · Moshe Szyf · Nadine Provençal · Linda Booij
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    ABSTRACT: Over the past decade, epigenetic analyses have made important contributions to our understanding of healthy development and a wide variety of adverse conditions such as cancer and psychopathology. There is increasing evidence that DNA methylation is a mechanism by which environmental factors influence gene transcription and, ultimately, phenotype. However, differentiating the effects of the environment from those of genetics on DNA methylation profiles remains a significant challenge. Monozygotic (MZ) twin study designs are unique in their ability to control for genetic differences because each pair of MZ twins shares essentially the same genetic sequence with the exception of a small number of de novo mutations and copy number variations. Thus, differences within twin pairs in gene expression and phenotype, including behavior, can be attributed in the majority of cases to environmental effects rather than genetic influence. In this article, we review the literature showing how MZ twin designs can be used to study basic epigenetic principles, contributing to understanding the role of early in utero and postnatal environmental factors on the development of psychopathology. We also highlight the importance of initiating longitudinal and experimental studies with MZ twins during pregnancy. This approach is especially important to identify: (1) critical time periods during which the early environment can impact brain and mental health development, and (2) the specific mechanisms through which early environmental effects may be mediated. These studies may inform the optimum timing and design for early preventive interventions aimed at reducing risk for psychopathology.
    No preview · Article · Nov 2015 · Twin Research and Human Genetics
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    ABSTRACT: Objective: To test whether adolescents who are victimized by peers are at heightened risk for suicidal ideation and suicide attempt, using both cross-sectional and prospective investigations. Method: Participants are from the Quebec Longitudinal Study of Child Development, a general population sample of children born in Quebec in 1997 through 1998 and followed up until 15 years of age. Information about victimization and serious suicidal ideation and suicide attempt in the past year was obtained at ages 13 and 15 years from self-reports (N = 1,168). Results: Victims reported concurrently higher rates of suicidal ideation at age 13 years (11.6-14.7%) and suicide attempt at age 15 years (5.4-6.8%) compared to those who had not been victimized (2.7-4.1% for suicidal ideation and 1.6-1.9% for suicide attempt). Being victimized by peers at 13 years predicted suicidal ideation (odds ratio [OR] = 2.27; 95% CI = 1.25-4.12) and suicide attempt (OR = 3.05, 95% CI = 1.36-6.82) 2 years later, even after adjusting for baseline suicidality and mental health problems and a series of confounders (socioeconomic status, intelligence, family's functioning and structure, hostile-reactive parenting, maternal lifetime suicidal ideation/suicide attempt). Those who were victimized at both 13 and 15 years had the highest risk of suicidal ideation (OR = 5.41, 95% CI = 2.53-11.53) and suicide attempt (OR = 5.85, 95% CI = 2.12-16.18) at 15 years. Conclusion: Victimization is associated with an increased risk of suicidal ideation and suicide attempt over and above concurrent suicidality and prior mental health problems. The longer the history of victimization, the greater the risk.
    No preview · Article · Nov 2015 · Journal of the American Academy of Child and Adolescent Psychiatry

  • No preview · Article · Nov 2015
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    ABSTRACT: Conduct problems have been associated with poor language development, however the direction of this association in early childhood remains unclear. This study examined the longitudinal directional associations between conduct problems and expressive language ability. Children enrolled in the UK Millennium Cohort Study (N = 14, 004; 50.3 % boys) were assessed at 3 and 5 years of age. Parent reports of conduct problems and standardised assessments of expressive language were analyzed using cross-lagged modeling. Conduct problems at 3 years was associated with poorer expressive language at 5 years and poorer expressive language at 3 years was associated with increased conduct problems by 5 years. The results support reciprocal associations, rather than a specific unidirectional path, which is commonly found with samples of older children. The emergence of problems in either domain can thus negatively impact upon the other over time, albeit the effects were modest. Studies examining the effects of intervention targeting conduct problems and language acquisition prior to school entry may be warranted in testing the efficacy of prevention programmes related to conduct problems and poor language ability early in childhood.
    No preview · Article · Oct 2015 · Journal of Abnormal Child Psychology
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    ABSTRACT: Background The monoamine oxidase A (MAOA) gene has been shown to moderate the impact of maltreatment on antisocial behaviour. Replication efforts have, however, yielded inconsistent results.AimsTo investigate whether the interaction between the MAOA gene and violence is present across the full distribution of violence or emerges at higher levels of exposure.Method Participants were 327 male members of the Québec Longitudinal Study of Kindergarten Children. Exposure to violence comprised retrospective reports of mother's and father's maltreatment, sexual and physical abuse. Conduct disorder and antisocial personality symptoms were assessed in semi-structured interviews and partner violence, property-violent crimes and arrest were self-reported.ResultsNon-linear interactions between the MAOA gene and violence were detected, suggesting that the genetic moderation may come about once a certain level of violence is experienced.Conclusions Future studies should investigate the mechanisms translating substantial violence exposure, which could, subsequently, trigger the expression of genetically based differences in antisocial behaviour.
    No preview · Article · Oct 2015 · The British journal of psychiatry: the journal of mental science
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    DESCRIPTION: This study examined the associations between intrinsic motivation and achievement in mathematics in a sample of 1478 Canadian school-age children followed from grades 1 to 4 (age 7-10). Children self-reported their intrinsic motivation toward mathematics, whereas achievement was measured through direct assessment of mathematics abilities. Cross-lagged models showed that achievement predicted intrinsic motivation from grades 1 to 2, and from grades 2 to 4. However, intrinsic motivation did not predict achievement at any time. This developmental pattern of association was gender invariant. Contrary to the hypothesis that motivation and achievement are reciprocally associated over time, our results point to a directional association from prior achievement to subsequent intrinsic motivation. Results are discussed in light of their theoretical and practical implications.
    Full-text · Research · Sep 2015

  • No preview · Article · Sep 2015 · Psychoneuroendocrinology
  • Richard E. Tremblay
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    ABSTRACT: This article takes an international and historical perspective to discuss the present state of knowledge on the developmental origins of physical aggression and its implications for the prevention of chronic physical aggression. An increasing number of longitudinal studies of singleton and twins initiated at birth or during the first few years of life are showing that physical aggressions are more frequent in early childhood than at any other time during the life-span. Because chronic physical aggression generally starts in early childhood, preventive interventions during this period are much more likely to be effective and substantially decrease the costs of criminal behavior during adolescence and early adulthood. Unfortunately, most criminological studies on physical aggression development and prevention target the adolescent and adulthood periods and do not take into account gene-environment contributions. Early childhood studies are needed to identify early bio-psycho-social mechanisms that put individuals on a chronic trajectory of physical aggression from early childhood to adulthood. These studies can also help identify the preventive interventions that are most effective in preventing a life-course of crime and misery. Developmental criminology needs to take a bio-psycho-social intergenerational and life-span perspective as well as focus more systematically on females as the key target for intergenerational prevention of chronic physical aggression.
    No preview · Article · Sep 2015 · European Journal of Criminology
  • Rene Carbonneau · Michel Boivin · Mara Brendgen · Daniel Nagin · Richard E Tremblay
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    ABSTRACT: Comorbidity is frequent among disruptive behaviors (DB) and leads to mental health problems during adolescence and adulthood. However, the early developmental origins of this comorbidity have so far received little attention. This study investigated the developmental comorbidity of three DB categories during early childhood: hyperactivity-impulsivity, non-compliance, and physical aggression. Joint developmental trajectories of DB were identified based on annual mother interviews from age 1½ to 5 years, in a population-representative birth-cohort (N = 2045). A significant proportion of children (13 % to 21 %, depending on the type of DB) consistently displayed high levels of hyperactivity-impulsivity, non-compliance, or physical aggression from age 1½ to 5 years. Developmental comorbidity was frequent, especially for boys: 10 % of boys and 3.7 % of girls were on a stable trajectory with high levels of symptoms for the three categories of DB. Significant associations were observed between preschool joint-trajectories of DB and indicators of DB and school adjustment assessed by teachers in first grade. Preschoolers who maintained high levels of hyperactivity-impulsivity, non-compliance, and physical aggression, displayed the highest number of DB symptoms in first grade for all categories according to their teacher. They were also among the most disadvantaged of their class for school adjustment indicators. Thus, DB manifestations and developmental comorbidity of DB are highly prevalent in infancy. Early childhood appears to be a critical period to prevent persistent and comorbid DB that leads to impairment at the very beginning of school attendance and to long-term serious health and social adjustment problems.
    No preview · Article · Aug 2015 · Journal of Abnormal Child Psychology
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    ABSTRACT: Prenatal and early postnatal adversities have been shown to be associated with brain development. However, we do not know how much of this association is confounded by genetics, nor whether the postnatal environment can moderate the impact of in utero adversity. This study used a monozygotic (MZ) twin design to assess (1) the association between birth weight (BW) and brain volume in adolescence, (2) the association between within-twin-pair BW discordance and brain volume discordance in adolescence, and (3) whether the association between BW and brain volume in adolescence is mediated or moderated by early negative maternal parenting behaviours. These associations were assessed in a sample of 108 MZ twins followed longitudinally since birth and scanned at age 15. The total grey matter (GM) and white matter (WM) volumes were obtained using the Diffeomorphic Anatomical Registration Through Exponentiated Lie Algebra (DARTEL) toolbox in the Statistical Parametric Mapping version 8 (SPM8). We found that the BW was significantly associated with the total GM and WM volumes, particularly in the superior frontal gyrus and thalamus. Within-twin-pair discordance in BW was also significantly associated with within-pair discordance in both the GM and the WM volumes, supporting the hypothesis that the specific in utero environment is associated with brain development independently of genetics. Early maternal hostile parenting behaviours and depressive symptoms were associated with total GM volume but not WM volume. Finally, greater early maternal hostility may moderate the association between the BW and GM volume in adolescence, since the positive association between the BW and total GM volume appeared stronger at higher levels of maternal hostility (trend). Together, these findings support the importance of the in utero and early environments for brain development. © 2015 S. Karger AG, Basel.
    No preview · Article · Aug 2015 · Developmental Neuroscience
  • Rene Carbonneau · Frank Vitaro · Mara Brendgen · Richard E Tremblay
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    ABSTRACT: To estimate trajectories of gambling variety from mid-adolescence to age 30, and compare the different trajectory-groups with regard to the type and the frequency of gambling activities practiced, and gambling-related problems. Prospective longitudinal cohort study. Province of Quebec, Canada. A mixed-gender general population cohort assessed at ages 15 (N = 1882), 22 (N = 1785), and 30 (N = 1358). Adolescent and adult versions of the South Oaks Gambling Screen (SOGS). Group-based trajectory analysis identified three distinct trajectories: A Late-onset Low trajectory (26.7% of sample) initiating gambling at age-22, an Early-onset Low trajectory (64.8% of sample), characterized by 1-2 different activities from age-15 onwards, and a High trajectory (8.4% of sample), with an average of 4-5 different activities from age 15 to 30. Males (14.2%) were 4 times more likely to be on a High-trajectory than females (3.5%) (p < .001). Preferred types of gambling activities were similar across the three trajectories. Participants on a High-trajectory reported higher gambling frequency at ages 15 and 30, and were more likely to experience problem gambling at age 30: 3.09 (95%CI = 1.66, 5.75) and 2.26 (95%CI = 1.27, 4.04) times more, respectively, than Late-onset Low and Early-onset Low participants, even when socioeconomic status (SES), frequency of gambling and problem gambling in adolescence, gender, age-30 education, SES, and frequency of gambling, were controlled. Engaging in several different types of gambling in early adulthood appears to be a risk factor for emergence of problem gambling. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.
    No preview · Article · Aug 2015 · Addiction
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    ABSTRACT: This study examined the contribution of nonparental child-care services received during the preschool years to the development of social behavior between kindergarten and the end of elementary school with a birth cohort from Québec, Canada (N = 1,544). Mothers reported on the use of child-care services, while elementary school teachers rated children's shyness, social withdrawal, prosociality, opposition, and aggression. Children who received nonparental child-care services were less shy, less socially withdrawn, more oppositional, and more aggressive at school entry (age 6 years). However, these differences disappeared during elementary school as children who received exclusive parental care caught up with those who received nonparental care services. This “catch-up” effect from the perspective of children's adaptation to the social group is discussed.
    Full-text · Article · Aug 2015 · Child Development
  • M Brenner · S M Côté · M Boivin · R E Tremblay
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    ABSTRACT: We aim to explore the association of a severe congenital malformation (SCM) with postnatal family functioning and parents' separation/divorce and to examine if this association might be moderated by birth order of the child and parental level of education. SCM refers to malformations that, without medical intervention, cause handicap or death. Using the Quebec Longitudinal Study of Child Development, an ongoing population-based birth cohort study initiated in 1998, we compared 1675 families of children with and without a SCM to identify if having a child with a SCM was associated with maternal perception of family functioning. We examined if an SCM was associated with parents' separation and examined parents' education level and birth order of the children to evaluate whether these factors had any moderating effect on the results. There were no significant differences in family functioning between families with and without a SCM child at 5 and 17 months. At 5 months, family functioning was significantly better (P = 0.03) for families with a SCM firstborn child than for families with a SCM child that is not firstborn. For parental separation, no significant differences were observed at 5 and 29 months and 4 years. No significant moderating effects were observed for birth order and parental education on parental separation. Families of children with a SCM do not appear to be at higher risk of family dysfunction within the first 17 months after birth nor of parental separation within the first 4 years after birth. Family functioning tends to be worst in families where the child with SCM is the second or subsequent child born. © 2015 John Wiley & Sons Ltd.
    No preview · Article · Jul 2015 · Child Care Health and Development
  • René Carbonneau · Frank Vitaro · Mara Brendgen · Richard E Tremblay
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    ABSTRACT: Studies of gambling starting before adulthood in the general population are either cross-sectional, based on the stability of these behaviors between 2 time points, or cover a short developmental period. The present study aimed at investigating the developmental trajectories of gambling problems across 3 key periods of development, mid-adolescence, early adulthood, and age 30, in a mixed-gender cohort from the general population. Using a semiparametric mixture model, trajectories were computed based on self-reports collected at ages 15 (N = 1,882), 22 (N = 1,785), and 30 (N = 1,358). Two distinct trajectories were identified: 1 trajectory including males and females who were unlikely to have experienced gambling problems across the 15-year period, and 1 trajectory including participants likely to have experienced at least 1 problem over the last 12 months at each time of assessment. Participants following a high trajectory were predominantly male, participated frequently in 3 to 4 different gambling activities, and were more likely to report substance use and problems related to their alcohol and drug consumption at age 30. Thus, gambling problems in the general population are already observable at age 15 in a small group of individuals, who maintain some level of these problems through early adulthood, before moderately but significantly desisting by age 30, while also experiencing other addictive behaviors and related problems. (PsycINFO Database Record (c) 2015 APA, all rights reserved).
    No preview · Article · Jul 2015 · Psychology of Addictive Behaviors
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    Simon Larose · Stéphane Duchesne · Michel Boivin · Frank Vitaro · Richard E. Tremblay

    Full-text · Article · Jul 2015

Publication Stats

20k Citations
1,723.58 Total Impact Points


  • 2014-2015
    • Tomsk State University
      Tomsk, Tomsk, Russia
  • 2008-2015
    • University College Dublin
      • School of Public Health, Physiotherapy & Population Science
      Dublin, Leinster, Ireland
  • 1997-2015
    • McGill University
      • • Department of Psychology
      • • Department of Medicine
      Montréal, Quebec, Canada
  • 1988-2015
    • Université de Montréal
      • • School of Psycho-Education
      • • Department of Pediatrics
      • • Department of Psychiatry
      Montréal, Quebec, Canada
  • 2011-2012
    • Université René Descartes - Paris 5
      Lutetia Parisorum, Île-de-France, France
  • 1999-2012
    • Université du Québec à Montréal
      • Department of Psychology
      Montréal, Quebec, Canada
    • Netherlands Institute for the Study of Crime and Law Enforcement (NSCR)
      Amsterdamo, North Holland, Netherlands
  • 1997-2010
    • Laval University
      • School of Psychology
      Quebec City, Quebec, Canada
  • 2005-2009
    • Utrecht University
      • Division of Developmental Psychology
      Utrecht, Utrecht, Netherlands
    • The University of Winnipeg
      • Department of Economics
      Winnipeg, Manitoba, Canada
  • 2007
    • McMaster University
      Hamilton, Ontario, Canada
    • Concordia University Montreal
      • Department of Psychology
      Montréal, Quebec, Canada
  • 2006
    • University of Ottawa
      • School of Psychology
      Ottawa, Ontario, Canada
  • 2004
    • Childcare Resource and Research Unit
      Toronto, Ontario, Canada
    • University of Oslo
      • Department of Psychology
      Oslo, Oslo, Norway
  • 2003
    • Auburn University
      • Department of Human Development and Family Studies
      AUO, Alabama, United States
  • 2001
    • Carnegie Mellon University
      Pittsburgh, Pennsylvania, United States
  • 2000-2001
    • Hôpital du Sacré-Coeur de Montréal
      • Center for Advanced Research in Sleep Medicine
      Montréal, Quebec, Canada
  • 1994
    • University of Jyväskylä
      • Department of Psychology
      Jyväskylä, Western Finland, Finland