cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.60641/g0hs-zj46
title: Dental characteristics

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: Dental characteristics that are assessed include teething and cavities.
description: In NTR project YC_ADHMRI, dental care was assessed through a telephone interview.
DOI: 10.60641/3wpd-rd37
title: Kind of Person Implicit Theory Scale

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: The “Kind of Person” Implicit Theory Scale is an 8-item measure that assesses how much people believe they can change and grow.
DOI: 10.60641/csyk-3r36
title: Cantril ladder

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: The Cantril ladder is an assessment of the subjective quality of life on a scale from 0 to 10.
DOI: 10.60641/69zw-dx43
title: Satisfaction with Life Scale (SWLS)

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: The Satisfaction with Life Scale (SWLS) is a 5-item scale designed to measure global cognitive judgments of one’s life satisfaction (it is not a measure of either positive or negative affect). The scale does not assess satisfaction with life domains such as health or finances, but allows subjects to integrate and weight these domains in whatever way they choose.
DOI: 10.60641/4sa8-nr29
title: Peptide hormones

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: Peptide hormones, for instance Adrenocorticotropic Hormone (ACTH, pituitary hormone), Alpha-Melanocyte-Stimulating Hormone (α-MSH, Melanocortin), Luteinizing Hormone (LH), Cholecytokinin, and Follicle Stimulating Hormone (FSH), measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
description: In NTR projects YC_ACTIONBB1_1 and YC_ACTIONBB1_2, urinary Cholecytokinin was obtained with ELISA (see: Appendix 2 of https://hdl.handle.net/1871.1/ff5055ee-113a-45f7-a40f-8a624cef4c84). In NTR projects YC_BS1, YC_BS2, and YC_BS3, urinary FSH and LH levels were measured by means of an immunometric (lumininescention) assay (Architect Abbott Laboratories Diagnostics Division Abbott Park, Illinois USA).
DOI: 10.60641/rjma-gd34
title: Liver enzymes

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: Liver enzymes, for instance Albumin, Jodide, Aspartaat Aminotransferase (ASAT), and Alanine Transaminase (ALAT), measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
description: In NTR projects YC_ACTIONBB1_1, YC_ACTIONBB1_2, YC_ACTIONBB2, and YC_ACTIONBB3, urinary creatinine was measured using a colorimetric assay kit according to manufacturer’s instructions (Cayman, Ann Harbor, MI, USA see: Appendix 2 dissertation Fiona Hagenbeek (https://hdl.handle.net/1871.1/ff5055ee-113a-45f7-a40f-8a624cef4c84) and https://doi.org/10.3389/fpsyt.2020.00165). In NTR projects YC_ACTIONBB1_1, YC_ACTIONBB1_2, urinary albumin was measured with ELISA (see Appendix 2 of https://hdl.handle.net/1871.1/ff5055ee-113a-45f7-a40f-8a624cef4c84 and https://doi.org/10.3389/fpsyt.2020.00165).
DOI: 10.60641/7s1v-cz42
title: Reading the Mind in the Eyes Test (RMET)

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: The Reading the Mind in the Eyes Test (RMET) assesses the ability to recognize complex mental states as expressed by human eyes. Participants pick one of four options (e.g. puzzled, nervous, insisting or contemplative) which they think best describes what the person in each photograph is thinking or feeling.
DOI: 10.60641/cvgq-pw58
title: Functional Magnetic Resonance Imaging (fMRI)

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: Functional magnetic resonance imaging (MRI) is a non-invasive technique for examining brain activity. It captures ongoing functional connectivity patterns within the brain, either spontaneously (at rest), or during a specific task.
description: In YC_BS2 and YC_BS3 resting state fMRI was obtained from whole head MRI scan acquired with a 1.5 Tesla Philips Achieva scanner (Philips, Best, The Netherlands, for protocol details see: https://doi.org/10.1017/thg.2012.4). In YC_ADHMRI functional scanning was performed during the Stroop color-word task and a modified version of the Eriksen flanker task. During these tasks, the fMRI BOLD (blood oxygen level dependent) signal was recorded (see: https://doi.org/10.1016/j.neuroscience.2009.01.056).
DOI: 10.60641/hyks-dg93
title: Steroid hormones

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: Steroid hormones, for instance Testosterone, Estrogen, Dehydroepiandrosterone (DHEA), and Cortisol, measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
description: In NTR, salivary testosterone (YC_BS1, YC_BS2, YC_BS3, YE_ATTEF2, YE_COG12, YE_COG18), salivary cortisol levels (YC_BS1, YC_BS2, YE_ATTEF2, YE_COG12, YE_COG18) and urinary estradiol levels (YC_BS1, YC_BS2, YC_BS3) were measured. 

Specifically, in NTR projects YC_BS1, YC_BS2, and YC_BS3, salivary testosterone levels were determined with an immunometric (lumininescention) assay (ILB, Hamburg). In NTR projects YC_BS1 and YC_BS2, salivary cortisol was determined by time-resolved fluorescence immunoassay (Department of Psychology, Dresden University of Technology, Dresden, Germany). In NTR project YE_COG12, salivary cortisol was determined by time-resolved fluorescence immunoassay (see: https://doi.org/10.1023/A:1025321609994), and salivary testosterone was measured after diethylether extraction using an in-house competitive radioimmunoassay employing a polyclonal antitestosterone-antibody (Dr.Pratt AZG 3290; see: https://doi.org/10.1375/twin.9.4.558). Total urinary estradiol levels (projects YC_BS1, YC_BS2, and YC_BS3) were determined using a competitive (luminiscention) immunoassay (Architect, Abbott Laboratories, Abbott Park, Illinois, USA).
DOI: 10.60641/2ygy-ep81
title: Subjective Happiness Scale (SHS)

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: The Subjective Happiness Scale (SHS) is a 4-item scale of global subjective happiness. Two items ask respondents to characterize themselves using both absolute ratings and ratings relative to peers, whereas the other two items offer brief descriptions of happy and unhappy individuals and ask respondents the extent to which each characterization describes them.
DOI: 10.60641/s9dh-dc48
title: Breastfeeding

description: The Netherlands Twin Register (NTR) consists of individuals who have agreed to participate in twin-family studies and was established and is managed by the Department of Biological Psychology, VU University Amsterdam (see: https://tweelingenregister.vu.nl/). The NTR was established in 1987 and has enrolled around 120.000 twins and a roughly equal number of their relatives. The majority of twin families have participated one or more times in survey studies on a host of epidemiological variables including social demography, personality, lifestyle, somatic and mental health, and subsamples took part in biomaterial collection (e.g. DNA) and dedicated projects for e.g. neuropsychological, biomarker, and behavioral traits. The recruitment into the NTR is fully inclusive without any restrictions on enrolment. The NTR is committed to actively seek the commitment of its participants to science and their continued involvement in NTR research by maintaining a website, electronic newsletters, and the MijnNTR portal that provides personalized feedback to participants. The NTR resources, e.g. the longitudinal phenotyping, the extended pedigree structures, and the multi-generation genotyping allow for future twin-family research that will contribute to gene discovery, causality modelling, and studies of genetic and cultural inheritance of behavioral traits and mental and physical health. In the CID data catalogue, only the NTR projects for children and adolescents (<18 years of age) have been included. This is refered to as the Young Netherlands Twin Register (YNTR). 
description: Breastfeeding was assessed through the question: Did the twin get breastfeeding?
description: In NTR, paternal reports are available since 2014.