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  • wave YE_ATTEF3

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    This project is part three of a longitudinal twin study on attention and cognition. This project included the measurement eleven years after baseline and particularly focused on performance pressure. Twins that participated in the previous projects as preschoolers or preteens, were invited again, but additional twin pairs were recruited into the project....
    Created March 28, 2023 Updated March 28, 2023
  • wave YC_ACTIONBB1_1

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    This is the first wave of the technical pilot of the ACTION project (Aggression in Children: Unraveling gene-environment interplay to inform Treatment and interventION strategies Consortium; http://www.action-euproject.eu/). The aim of the technical pilot was to test the collection protocols for urine and buccal sample collection in children. The...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_TRIP4

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The Child Behavior Checklist was sent to parents of approximately 4-year old triplets, together with a short general questionnaire on parental and triplet characteristics (e.g., parental employment and religion, triplet school achievements and health).
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_TRF12

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The survey for the primary school teachers includes items on the teacher, class and school, functioning of the child, school performance, bullying and victimization (from 2010), and standardized questionnaires on problem behavior, namely the Teacher Report Form (TRF), the short version of the Conners’ Teacher Ratings Scale - Revised (CTRS-R), and the...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_TRIP3

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The Child Behavior Checklist (CBCL1.5-5) is sent to parents of approximately 3-year old triplets, together with a short general questionnaire on parental and triplet characteristics (e.g., parental employment and religion, triplet school achievements and health).
    Created March 28, 2023 Updated March 28, 2023
  • wave YC_BS3

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The main aim of this project was to explore to what extent genetic and environmental factors explain individual differences in brain development and cognition. The study was a part of a Dutch longitudinal study in which twins, their siblings and their parents were assessed at three years interval. This project included the measurement eight years after...
    Created March 28, 2023 Updated March 28, 2023
  • wave YC_ACTIONBB1_2

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    This is the second wave of the technical pilot of the ACTION project (Aggression in Children: Unraveling gene-environment interplay to inform Treatment and interventION strategies Consortium; http://www.action-euproject.eu/). The aim of the technical pilot was to test the collection protocols for urine and buccal sample collection in children. The...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_10

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The YNTR survey 9/10 targets the development of emotional and behavior problems, as assessed by the Child Behavior Checklist 6-18 (CBCL). From 2001 onwards, the Conners’ Parent Rating Scale — Revised (CPRS-R) was also included. In addition, these surveys included items on zygosity, medical conditions, vaccinations, tonsillectomy (from 2005), demographic...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_5

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    In this project surveys are sent to the mothers around the 5th birth year of the twin. The YNTR survey 5 includes items on child care and school, growth, zygosity, toilet training, asthma and eczema, fine motor coordination, language development, and problem behaviors as assessed by a short version of the Devereux Child Behavior Checklist (DCB). The...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_TRIP7

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The Child Behavior Checklist (CBCL6_18) is sent to parents of approximately 7-year old triplets, together with a short general questionnaire on parental and triplet characteristics (e.g., parental employment and religion, triplet school achievements and health).
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_DHBQP

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    The Dutch Health and Behavior Questionnaire (DHBQ) was developed at the department of Biological Psychology of the VU University. It is a collection of standardized questions targeting multiple domains. The focus of the survey is on emotional and behavioral problems assessed by the Youth Self-Report (YSR), subjective wellbeing, lifestyle, exercise...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_TRIP1_2

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    In 2008, a combination of the triplet surveys at age 1 and 2 was sent to mothers of all triplets. Since 2009, the combined survey 1 and 2 served as the first survey for newly registered triplets. The combined survey comprises items on pregnancy, gestational age, smoking and alcohol consumption during pregnancy, mode of delivery, breastfeeding, attaining...
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_2

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    This projects gathers maternal report (fathers added in 2014) on motor development, breastfeeding, health, handedness in 2-year old twins and growth data (including height and weight) as obtained from the Dutch National Health Services (from 2010). From 2008 onwards, items on well-being, child care, and temperament were added to the surveys.
    Created March 28, 2023 Updated March 28, 2023
  • wave YS_TRF5

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    Teacher data were collected in 2 sub-groups of 5-year-olds. One as part of the study YE_ATTEF1 (Polderman et al., 2006) and one as a try-out study in 2008. The survey for the primary school teachers includes items on the teacher, class and school, functioning of the child, school performance, and standardized questionnaires on problem behavior, namely the...
    Created March 28, 2023 Updated March 28, 2023
  • wave YC_ACTIONBB3

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    This is the Main Study of the ACTION project (Aggression in Children: Unraveling gene-environment interplay to inform Treatment and interventION strategies Consortium; http://www.action-euproject.eu/). Here, data collection of first-morning urine samples for metabolomics biomarker discovery and buccal-cell DNA samples for (epi)genetics was conducted in a...
    Created March 28, 2023 Updated March 28, 2023
  • wave YE_COG10

    Study:NTR
    Parent cohort:NTR: Young Netherlands Twin Register
    Publisher: Vrije Universiteit Amsterdam
    This study is the third measurement of a longitudinal study on the development of brain function, intelligence and problem behavior, that started in 1992 (waves one and two not included in CD2). A short version of the Revised Amsterdam Children Intelligence Test (RAKIT) was administered to a group of ten-year-old twin pairs.
    Created March 28, 2023 Updated March 28, 2023