Dataset

EEG - Resting state

The EEG - resting state aims to measure brain activity during rest.

For EEG recordings, a 64-channel HydroCel Geodesic Sensor Net along with NetStation software from Electrical Geodesics in Eugene, OR, USA, was used. The EEG signals were amplified using the NetAmps300 amplifier. To ensure optimal signal quality, each electrode's impedance was maintained below 100 kΩ. To avoid fatigue, irritability, and loss of attention in young children, we streamlined the preparation process by adjusting and collecting data from a selective subset of electrodes. These selected electrodes were strategically placed on specific brain regions, including frontal (F3, F4), frontotemporal (F7, F8), central (C3, C4), temporal (T7, T8), parietal (P3, P4), occipital (P7, P8), and the mastoids on the left and right sides. Additionally, two electrodes were positioned below the eyes [62, 63] to capture specific eye-related signals during the recordings. During the recording sessions, the reference for EEG signals was set to Cz. The data underwent low-pass filtering at the Nyquist frequency, which corresponds to 100 Hz, while maintaining a sampling rate of 250 Hz.

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Keywords	eeg resting state neuroimaging electroencephalography
Constructs	physiology
Waves	Early Childhood Cohort ECC - T2 C 4.0 - 6.0 years From 2015-08-27 to 2016-10-21 ECC - T3 C 5.0 - 7.0 years From 2016-08-09 to 2017-11-07
Mode of collection	MeasurementsAndTests EEG
Analysis unit	Individual
Instrument name	Electroencephalography - rest measurement
Measure name	EEG - Resting state
References	van Wijk, I. C., Huffmeijer, R., Bosdriesz, J. R., Bakermans-Kranenburg, M. J., Kolijn, L., van IJzendoorn, M. H., Vrijhof, C. I., & van den Bulk, B. G. (2019). Behavioral genetics of temperament and frontal asymmetry in early childhood. Journal of Experimental Child Psychology, 179, 348–361. https://doi.org/10.1016/j.jecp.2018.11.015

Measure was collected within the following cohort study:

Leiden Consortium on Individual Development Cohort study

Purpose	The primary aim of the Leiden-CID study is to increase our understanding of the developmental pathways of social behavior and behavioral control that are important to the development of social competence, from early childhood to young adulthood. If we better understand the mechanisms involved in developmental processes of social competence, this allows us to understand optimal conditions that add to the well-being of developing individuals.
description
Alternate title	L-CID, Leiden-CID, Samen Uniek
Data access information	L-CID believes that open science is important in improving scientific quality. Therefore, our we make our codebooks, protocols and collected (meta)data accessible to other researchers. https://www.developmentmatters.nl/data-access/
Publisher	Leiden University Leiden University Medical Center
Principal investigators	van IJzendoorn, Marinus Leiden University, Erasmus University Rotterdam, University of Cambridge Crone, Eveline Leiden University, Erasmus University Rotterdam Bakermans-Kranenburg, Marian Leiden University, Vrije Universiteit Amsterdam Engels, Rutger Leiden University, Erasmus University Rotterdam
Cohort study international identifier
Language	NL
Funding information	Dutch Research Council 024.001.003 Funder identifier https://ror.org/04jsz6e67 Funder identifier type ROR Funder identifier type URI https://ror.org/ Funder award title Gravitation program Funder award URI
Contact information	Eveline Crone Leiden University, Erasmus University Rotterdam ecrone@fsw.leidenuniv.nl
References	Crone, E. A., Achterberg, M., Dobbelaar, S., Euser, S., van den Bulk, B., van der Meulen, M., ... & van IJzendoorn, M. H. (2020). Neural and behavioral signatures of social evaluation and adaptation in childhood and adolescence: the Leiden consortium on individual development (L-CID). Developmental Cognitive Neuroscience, 45, 100805. https://doi.org/10.1016/j.dcn.2020.100805 Euser, S., Bakermans-Kranenburg, M. J., van den Bulk, B. G., Linting, M., Damsteegt, R. C., Vrijhof, C. I., ... & van IJzendoorn, M. H. (2016). Efficacy of the Video-feedback Intervention to promote Positive Parenting and Sensitive Discipline in Twin Families (VIPP-Twins): Study protocol for a randomized controlled trial. BMC Psychology, 4(1), 1-11. https://doi.org/10.1186/s40359-016-0139-y
Additional info (URL)
Additional information
Contributors	Wierenga, Lara Leiden University Achterberg, Michelle Leiden University, Erasmus University Rotterdam
Time method	Longitudinal
Universe	Same-sex (51% girls), mono- and dizygotic twins between 3 and 16 years old, and their parents (primary parent and other parent). Children in the early childhood cohort (ECC; N = 476) were followed from 3 to 9 years of age, whereas children in the middle childhood cohort (MCC; N = 514) were followed from 7 to 16 years. All participants lived in the Netherlands (within two hours travel time from Leiden). The majority of the participants were Caucasian (ECC: 88%, MCC: 90%). Additionally, participants had both a low, middle-, as well as a high socio-economic status (ECC: 7–37–56%, MCC: 9–46–45%). To be eligible to participate, potential participants had to be fluent in Dutch, their parents and grandparents had to be born in Europe (because of genetic analyses), and the twins should have the same gender. Excluded were children with a congenital disability, psychological disorder, chronic illness, hereditary disease, or a visual or hearing impairment if the disorder disabled the child from performing the behavioral tasks or from participating in the (f)MRI or EEG/ERP measure. Children with a previously diagnosed intellectual disability (IQ < 70), history of neurological or psychiatric illness and/or use of psychotropic medications were also excluded. Lastly, contraindications for fMRI, including metal implants, heart arrhythmia, and claustrophobia would lead to exclusion as well.

Alternate title	ecc
Description	The Early Childhood Cohort of the Leiden Consortium on Individual Development (L-CID) is a large-scale longitudinal intervention study in which +-250 families with same-sex twins, aged 3-4 at wave 1, are followed over a six year period. Annual assessments consist of alternating lab- or home visits during which behavioral and neurobiological data are collected. The collected data allow, among others, for testing which child characteristics shape the effect of (manipulated) environmental factors. The aim of the Early Childhood Cohort is twofold: 1. To investigate the development of social competence and behavioral control in children between 3 and 9 years old; 2. To dissect the reason why not all children are equally responsive to variations in the social environment.
Purpose	The primary aim of the Early Childhood Cohort of the Leiden Consortium on Individual Development (L-CID) study is to increase our understanding of the developmental pathways of social behavior and behavioral control that are important to the development of social competence, from early childhood to middle childhood. If we better understand the mechanisms involved in developmental processes of social competence, this allows us to understand optimal conditions that add to the well-being of developing individuals.
Publisher	Leiden University Leiden University Medical Center
Creators	van IJzendoorn, Marinus Leiden University, Erasmus University Rotterdam, University of Cambridge Crone, Eveline Leiden University, Erasmus University Rotterdam Bakermans-Kranenburg, Marian Leiden University, Vrije Universiteit Amsterdam Engels, Rutger Leiden University, Erasmus University Rotterdam
Language	NL
Cohort international identifier
Funding information	Dutch Research Council 024.001.003 Funder identifier https://ror.org/04jsz6e67 ROR Identifier type URI https://ror.org/ Funder award title Gravitation program Funder award URI
Cohort reference papers
Classification
Contact information
Waves
Contributors	Wierenga, Lara Leiden University Achterberg, Michelle Leiden University, Erasmus University Rotterdam
References	Crone, E. A., Achterberg, M., Dobbelaar, S., Euser, S., van den Bulk, B., van der Meulen, M., ... & van IJzendoorn, M. H. (2020). Neural and behavioral signatures of social evaluation and adaptation in childhood and adolescence: the Leiden consortium on individual development (L-CID). Developmental Cognitive Neuroscience, 45, 100805. https://doi.org/10.1016/j.dcn.2020.100805 Euser, S., Bakermans-Kranenburg, M. J., van den Bulk, B. G., Linting, M., Damsteegt, R. C., Vrijhof, C. I., ... & van IJzendoorn, M. H. (2016). Efficacy of the Video-feedback Intervention to promote Positive Parenting and Sensitive Discipline in Twin Families (VIPP-Twins): Study protocol for a randomized controlled trial. BMC Psychology, 4(1), 1-11. https://doi.org/10.1186/s40359-016-0139-y
Country code	NL
Geographic location
Lowest geographic reference
Highest geographic reference	country
Cohort universe description	3-9 year old same-sex twin pairs and their parents
Analysis unit
Additional info (URL)
Additional information
Time method	Longitudinal.CohortEventBased

Measure was collected within the following wave(s):

ECC - T2 Wave

Wave alternate title	ecc2, ecc_ses-w02
Short description of the wave	Wave 2 of the Early Childhood Cohort consisted of parent-reported online questionnaires and a lab visit in which 4-6 year old children from about 200 families were observed while performing several tasks. During some of the tasks, brain activity was measured by means of electroencephalography (EEG). Additionally, physiological samples were taken (e.g., hair and DNA samples). Participants were also asked to take measurements on their own at home for several days after the lab visit. Furthermore, to experimentally examine social enrichment, we included a parenting intervention, which allows investigating the causal effects of parenting on social development. Between the 2nd (ECC - T2) and 3rd (ECC - T3) measurement, 40% of the sample received a video feedback intervention to promote positive parenting and sensitive discipline (VIPP-SD).
Type of StudyUnit
Publisher	Leiden University Leiden University Medical Center
Creators	van IJzendoorn, Marinus Leiden University, Erasmus University Rotterdam, University of Cambridge Crone, Eveline Leiden University, Erasmus University Rotterdam Bakermans-Kranenburg, Marian Leiden University, Vrije Universiteit Amsterdam Engels, Rutger Leiden University, Erasmus University Rotterdam
Funding information	024.001.003 Funder identifier ROR Identifier type URI https://ror.org/ Funder award title Gravitation program Funder award URI
References
(sub) cohort	L-CID: Early Childhood Cohort
Life stage
Coverage percentage of the measurement for this wave
Start date wave collection	2015-08-27
End date wave collection	2016-10-21
Wave universe description	4.0 - 6.0 years
Stage of measurement
Language	NL
Description of physical data product	paper forms/questionnaires, digital files, biomedical samples
Additional info (URL)
Additional information
Contributors	Langhout-van den Bulk, Bianca Erasmus University Rotterdam van den Berghe, Brigitte de Vries, Charlotte Vrijhof, Claudia van Hees, Debby de Visser, Ilse van Wijk, Ilse Kolijn, Laura Vrije Universiteit Amsterdam van Setten, Lianne Vrije Universiteit Amsterdam Vermeulen, Rachel Damsteegt, Rani de Vet, Sanne Leiden University Euser, Saskia Dobbinga, Sjoerd

ECC - T3 Wave

Wave alternate title	ecc3, ecc_ses-w03
Short description of the wave	Wave 3 of the Early Childhood Cohort consisted of parent- and child-reported online questionnaires and a lab visit in which 5-7 year old children from about 200 families were observed while performing several tasks. During some of the tasks, brain activity was measured by means of electroencephalography (EEG). Additionally, physiological samples were taken (e.g., hair and DNA samples). Participants were also asked to take measurements on their own at home for several days after the lab visit. Furthermore, to experimentally examine social enrichment, we included a parenting intervention, which allows us to investigate causal effects of parenting on social development. Between the 2nd (ECC - T2) and 3rd (ECC - T3) measurement, 40% of the sample received a video feedback intervention to promote positive parenting and sensitive discipline (VIPP-SD).
Type of StudyUnit
Publisher	Leiden University Leiden University Medical Center
Creators	van IJzendoorn, Marinus Leiden University, Erasmus University Rotterdam, University of Cambridge Crone, Eveline Leiden University, Erasmus University Rotterdam Bakermans-Kranenburg, Marian Leiden University, Vrije Universiteit Amsterdam Engels, Rutger Leiden University, Erasmus University Rotterdam
Funding information	024.001.003 Funder identifier ROR Identifier type URI https://ror.org/ Funder award title Gravitation program Funder award URI
References
(sub) cohort	L-CID: Early Childhood Cohort
Life stage
Coverage percentage of the measurement for this wave
Start date wave collection	2016-08-09
End date wave collection	2017-11-07
Wave universe description	5.0 - 7.0 years
Stage of measurement
Language	NL
Description of physical data product	paper forms/questionnaires, digital files, biomedical samples
Additional info (URL)
Additional information
Contributors	Witte, Annemieke Vrije Universiteit Amsterdam Langhout-van den Bulk, Bianca Erasmus University Rotterdam van den Berghe, Brigitte de Vries, Charlotte van Hees, Debby de Visser, Ilse van Setten, Lianne Vrije Universiteit Amsterdam Zwerver, Lieuwke de Vet, Sanne Leiden University Euser, Saskia Dobbinga, Sjoerd

You can also access this dataset using the API (see API Docs).

author	None
author_email	None
creator_user_id	34768773-4537-4d74-8d9d-11e2b32cbbaf
dc_additional_info	For EEG recordings, a 64-channel HydroCel Geodesic Sensor Net along with NetStation software from Electrical Geodesics in Eugene, OR, USA, was used. The EEG signals were amplified using the NetAmps300 amplifier. To ensure optimal signal quality, each electrode's impedance was maintained below 100 kΩ. To avoid fatigue, irritability, and loss of attention in young children, we streamlined the preparation process by adjusting and collecting data from a selective subset of electrodes. These selected electrodes were strategically placed on specific brain regions, including frontal (F3, F4), frontotemporal (F7, F8), central (C3, C4), temporal (T7, T8), parietal (P3, P4), occipital (P7, P8), and the mastoids on the left and right sides. Additionally, two electrodes were positioned below the eyes [62, 63] to capture specific eye-related signals during the recordings. During the recording sessions, the reference for EEG signals was set to Cz. The data underwent low-pass filtering at the Nyquist frequency, which corresponds to 100 Hz, while maintaining a sampling rate of 250 Hz.
dc_analysis_unit	{Individual}
dc_cohort	L-CID
dc_instrument_name	Electroencephalography - rest measurement
dc_measure_name	EEG - Resting state
id	6f3b983d-e6a8-4bc1-ab4a-d35fbcf41a7f
isopen	False
license_title	None
maintainer	None
maintainer_email	None
metadata_created	2024-10-17T12:05:10.785749
metadata_modified	2024-10-20T12:29:51.321716
name	3a7c9c6a80581c6228aba72ba6ad2c5d
notes	The EEG - resting state aims to measure brain activity during rest.
num_resources	0
num_tags	0
organization	{'id': '74e90384-6fe3-44ca-8184-c4d845120a50', 'name': 'l-cid', 'title': 'L-CID', 'type': 'organization', 'description': 'The Leiden Consortium on Individual Development (L-CID) study was founded by Marinus van IJzendoorn, Eveline Crone, Marian Bakermans-Kranenburg and Rutger Engels in 2013. It was developed as one of four work packages of the overarching Consortium on Individual Development (CID). The L-CID study is a large-scale longitudinal intervention study in which 500 families with same-sex twins are followed over a six year period. L-CID has a cohort-sequential design with two cohorts: an early childhood cohort (ECC), aged 3-4 at wave 1, and a middle childhood cohort (MCC), aged 7-8 at wave 1. Annual assessments consist of alternating lab- or home visits during which behavioral and neurobiological data are collected. The collected data allow, among others, for testing which child characteristics shape the effect of (manipulated) environmental factors. The aim of L-CID is twofold: 1. To investigate the development of social competence and behavioral control in children between 3 and 14 years old; 2. To dissect the reason why not all children are equally responsive to variations in the social environment.', 'image_url': 'https://data.individualdevelopment.nl/img/logo_lcid.png', 'created': '2024-10-17T13:43:12.442911', 'is_organization': True, 'approval_status': 'approved', 'state': 'active'}
owner_org	74e90384-6fe3-44ca-8184-c4d845120a50
private	False
state	active
title	EEG - Resting state
type	measure
cohort	[{'cohort_alternate_title': 'ecc', 'cohort_description': 'The Early Childhood Cohort of the Leiden Consortium on Individual Development (L-CID) is a large-scale longitudinal intervention study in which +-250 families with same-sex twins, aged 3-4 at wave 1, are followed over a six year period. Annual assessments consist of alternating lab- or home visits during which behavioral and neurobiological data are collected. The collected data allow, among others, for testing which child characteristics shape the effect of (manipulated) environmental factors. The aim of the Early Childhood Cohort is twofold: 1. To investigate the development of social competence and behavioral control in children between 3 and 9 years old; 2. To dissect the reason why not all children are equally responsive to variations in the social environment.', 'cohort_language': 'NL', 'cohort_purpose': 'The primary aim of the Early Childhood Cohort of the Leiden Consortium on Individual Development (L-CID) study is to increase our understanding of the developmental pathways of social behavior and behavioral control that are important to the development of social competence, from early childhood to middle childhood. If we better understand the mechanisms involved in developmental processes of social competence, this allows us to understand optimal conditions that add to the well-being of developing individuals.', 'cohort_spatial_country_code': 'NL', 'cohort_spatial_highest_reference': 'country', 'cohort_time_method': 'Longitudinal.CohortEventBased', 'cohort_title': 'L-CID: Early Childhood Cohort', 'cohort_universe': '3-9 year old same-sex twin pairs and their parents', 'cohort_contributor': [{'cohort_contributor': 'Wierenga, Lara', 'cohort_contributor_affiliation': 'Leiden University', 'cohort_contributor_affiliation_identifier': 'https://ror.org/027bh9e22', 'cohort_contributor_affiliation_identifier_scheme': 'ROR', 'cohort_contributor_affiliation_identifier_schemeuri': 'https://ror.org/', 'cohort_contributor_identifier_schemeuri': 'https://orcid.org/', 'cohort_contributor_identifier_type': 'ORCID', 'cohort_contributor_pid': '0000-0001-9362-563X'}, {'cohort_contributor': 'Achterberg, Michelle', 'cohort_contributor_affiliation': 'Leiden University, Erasmus University Rotterdam', 'cohort_contributor_affiliation_identifier': 'https://ror.org/027bh9e22', 'cohort_contributor_affiliation_identifier_scheme': 'ROR', 'cohort_contributor_affiliation_identifier_schemeuri': 'https://ror.org/', 'cohort_contributor_identifier_schemeuri': 'https://orcid.org/', 'cohort_contributor_identifier_type': 'ORCID', 'cohort_contributor_pid': '0000-0001-5874-6495'}], 'cohort_creator': [{'cohort_creator_affiliation': 'Leiden University, Erasmus University Rotterdam, University of Cambridge', 'cohort_creator_affiliation_identifier': 'https://ror.org/027bh9e22', 'cohort_creator_affiliation_identifier_scheme': 'ROR', 'cohort_creator_affiliation_identifier_schemeuri': 'https://ror.org/', 'cohort_creator_identifier_schemeuri': 'https://orcid.org/', 'cohort_creator_identifier_type': 'ORCID', 'cohort_creator_name': 'van IJzendoorn, Marinus', 'cohort_creator_pid': '0000-0003-1144-454X'}, {'cohort_creator_affiliation': 'Leiden University, Erasmus University Rotterdam', 'cohort_creator_affiliation_identifier': 'https://ror.org/027bh9e22', 'cohort_creator_affiliation_identifier_scheme': 'ROR', 'cohort_creator_affiliation_identifier_schemeuri': 'https://ror.org/', 'cohort_creator_identifier_schemeuri': 'https://orcid.org/', 'cohort_creator_identifier_type': 'ORCID', 'cohort_creator_name': 'Crone, Eveline', 'cohort_creator_pid': '0000-0002-7508-6078'}, {'cohort_creator_affiliation': 'Leiden University, Vrije Universiteit Amsterdam', 'cohort_creator_affiliation_identifier': 'https://ror.org/027bh9e22', 'cohort_creator_affiliation_identifier_scheme': 'ROR', 'cohort_creator_affiliation_identifier_schemeuri': 'https://ror.org/', 'cohort_creator_identifier_schemeuri': 'https://orcid.org/', 'cohort_creator_identifier_type': 'ORCID', 'cohort_creator_name': 'Bakermans-Kranenburg, Marian', 'cohort_creator_pid': '0000-0001-7763-0711'}, {'cohort_creator_affiliation': 'Leiden University, Erasmus University Rotterdam', 'cohort_creator_affiliation_identifier': 'https://ror.org/027bh9e22', 'cohort_creator_affiliation_identifier_scheme': 'ROR', 'cohort_creator_affiliation_identifier_schemeuri': 'https://ror.org/', 'cohort_creator_identifier_schemeuri': 'https://orcid.org/', 'cohort_creator_identifier_type': 'ORCID', 'cohort_creator_name': 'Engels, Rutger', 'cohort_creator_pid': '0000-0003-1944-9126'}], 'cohort_funding': [{'cohort_funder': 'Dutch Research Council', 'cohort_funder_award_title': 'Gravitation program', 'cohort_funder_identifier': 'https://ror.org/04jsz6e67', 'cohort_funder_identifier_schemuri': 'https://ror.org/', 'cohort_funder_identifier_type': 'ROR', 'cohort_grant_number': '024.001.003'}], 'cohort_publisher': [{'cohort_publisher_identifier': 'https://ror.org/027bh9e22', 'cohort_publisher_identifier_type': 'ROR', 'cohort_publisher_name': 'Leiden University'}, {'cohort_publisher_identifier': 'https://ror.org/05xvt9f17', 'cohort_publisher_identifier_type': 'ROR', 'cohort_publisher_name': 'Leiden University Medical Center'}], 'cohort_references': [{'cohort_reference_citation': 'Crone, E. A., Achterberg, M., Dobbelaar, S., Euser, S., van den Bulk, B., van der Meulen, M., ... & van IJzendoorn, M. H. (2020). Neural and behavioral signatures of social evaluation and adaptation in childhood and adolescence: the Leiden consortium on individual development (L-CID). Developmental Cognitive Neuroscience, 45, 100805. https://doi.org/10.1016/j.dcn.2020.100805', 'cohort_reference_identifier': 'https://doi.org/10.1016/j.dcn.2020.100805', 'cohort_reference_identifier_type': 'DOI', 'cohort_reference_type': 'IsDescribedBy'}, {'cohort_reference_citation': 'Euser, S., Bakermans-Kranenburg, M. J., van den Bulk, B. G., Linting, M., Damsteegt, R. C., Vrijhof, C. I., ... & van IJzendoorn, M. H. (2016). Efficacy of the Video-feedback Intervention to promote Positive Parenting and Sensitive Discipline in Twin Families (VIPP-Twins): Study protocol for a randomized controlled trial. BMC Psychology, 4(1), 1-11. https://doi.org/10.1186/s40359-016-0139-y', 'cohort_reference_identifier': 'https://doi.org/10.1186/s40359-016-0139-y', 'cohort_reference_identifier_type': 'DOI', 'cohort_reference_type': 'IsDescribedBy'}]}]
dc_DOI	[{'dc_identifier_type': 'DOI', 'dc_pid': '10.60641/hvh2-zb15'}]
dc_constructs	[{'dc_construct': 'physiology'}]
dc_labels	[{'dc_label': 'eeg'}, {'dc_label': 'resting state'}, {'dc_label': 'neuroimaging'}, {'dc_label': 'electroencephalography'}]
dc_measurement_references	[{'dc_measurements_references_citation': 'van Wijk, I. C., Huffmeijer, R., Bosdriesz, J. R., Bakermans-Kranenburg, M. J., Kolijn, L., van IJzendoorn, M. H., Vrijhof, C. I., & van den Bulk, B. G. (2019). Behavioral genetics of temperament and frontal asymmetry in early childhood. Journal of Experimental Child Psychology, 179, 348–361. https://doi.org/10.1016/j.jecp.2018.11.015\n', 'dc_measurements_references_doi': '10.1016/j.jecp.2018.11.015'}]
dc_modes_of_collection	[{'dc_mode_of_collection': 'MeasurementsAndTests'}]
dc_modes_of_collection_sub	[{'dc_mode_of_collection_sub': 'EEG'}]
measure_age_range	[{'measure_age_month': 48}, {'measure_age_month': 49}, {'measure_age_month': 50}, {'measure_age_month': 51}, {'measure_age_month': 52}, {'measure_age_month': 53}, {'measure_age_month': 54}, {'measure_age_month': 55}, {'measure_age_month': 56}, {'measure_age_month': 57}, {'measure_age_month': 58}, {'measure_age_month': 59}, {'measure_age_month': 60}, {'measure_age_month': 61}, {'measure_age_month': 62}, {'measure_age_month': 63}, {'measure_age_month': 64}, {'measure_age_month': 65}, {'measure_age_month': 66}, {'measure_age_month': 67}, {'measure_age_month': 68}, {'measure_age_month': 69}, {'measure_age_month': 70}, {'measure_age_month': 71}, {'measure_age_month': 72}, {'measure_age_month': 73}, {'measure_age_month': 74}, {'measure_age_month': 75}, {'measure_age_month': 76}, {'measure_age_month': 77}, {'measure_age_month': 78}, {'measure_age_month': 79}, {'measure_age_month': 80}, {'measure_age_month': 81}, {'measure_age_month': 82}, {'measure_age_month': 83}, {'measure_age_month': 84}]
study	[{'study_alternate_title': ['L-CID', 'Leiden-CID', 'Samen Uniek'], 'study_language': 'NL', 'study_purpose': 'The primary aim of the Leiden-CID study is to increase our understanding of the developmental pathways of social behavior and behavioral control that are important to the development of social competence, from early childhood to young adulthood. If we better understand the mechanisms involved in developmental processes of social competence, this allows us to understand optimal conditions that add to the well-being of developing individuals.', 'study_time_method': 'Longitudinal', 'study_universe': 'Same-sex (51% girls), mono- and dizygotic twins between 3 and 16 years old, and their parents (primary parent and other parent). Children in the early childhood cohort (ECC; N = 476) were followed from 3 to 9\u2009years of age, whereas children in the middle childhood cohort (MCC; N = 514) were followed from 7 to 16 years. All participants lived in the Netherlands (within two hours travel time from Leiden). The majority of the participants were Caucasian (ECC: 88%, MCC: 90%). Additionally, participants had both a low, middle-, as well as a high socio-economic status (ECC: 7–37–56%, MCC: 9–46–45%).\n\nTo be eligible to participate, potential participants had to be fluent in Dutch, their parents and grandparents had to be born in Europe (because of genetic analyses), and the twins should have the same gender. Excluded were children with a congenital disability, psychological disorder, chronic illness, hereditary disease, or a visual or hearing impairment if the disorder disabled the child from performing the behavioral tasks or from participating in the (f)MRI or EEG/ERP measure. Children with a previously diagnosed intellectual disability (IQ < 70), history of neurological or psychiatric illness and/or use of psychotropic medications were also excluded. Lastly, contraindications for fMRI, including metal implants, heart arrhythmia, and claustrophobia would lead to exclusion as well.', 'title': 'Leiden Consortium on Individual Development', 'study_contact': [{'study_contact_affiliation': 'Leiden University, Erasmus University Rotterdam', 'study_contact_mail': 'ecrone@fsw.leidenuniv.nl', 'study_contact_name': 'Eveline Crone'}], 'study_contributor': [{'study_contributor_affiliation': 'Leiden University', 'study_contributor_affiliation_identifier': 'https://ror.org/027bh9e22', 'study_contributor_affiliation_identifier_scheme': 'ROR', 'study_contributor_affiliation_identifier_schemeuri': 'https://ror.org/', 'study_contributor_identifier_schemeuri': 'https://orcid.org/', 'study_contributor_identifier_type': 'ORCID', 'study_contributor_name': 'Wierenga, Lara', 'study_contributor_pid': '0000-0001-9362-563X'}, {'study_contributor_affiliation': 'Leiden University, Erasmus University Rotterdam', 'study_contributor_affiliation_identifier': 'https://ror.org/027bh9e22', 'study_contributor_affiliation_identifier_scheme': 'ROR', 'study_contributor_affiliation_identifier_schemeuri': 'https://ror.org/', 'study_contributor_identifier_schemeuri': 'https://orcid.org/', 'study_contributor_identifier_type': 'ORCID', 'study_contributor_name': 'Achterberg, Michelle', 'study_contributor_pid': '0000-0001-5874-6495'}], 'study_data_access': [{'study_data_access_URL': 'https://www.developmentmatters.nl/data-access/', 'study_data_access_description': 'L-CID believes that open science is important in improving scientific quality. Therefore, our we make our codebooks, protocols and collected (meta)data accessible to other researchers.'}], 'study_funding': [{'study_funder': 'Dutch Research Council', 'study_funder_award_title': 'Gravitation program', 'study_funder_identifier': 'https://ror.org/04jsz6e67', 'study_funder_identifier_schemuri': 'https://ror.org/', 'study_funder_identifier_type': 'ROR', 'study_grant_number': '024.001.003'}], 'study_principal_investigators': [{'study_pi_affiliation': 'Leiden University, Erasmus University Rotterdam, University of Cambridge', 'study_pi_affiliation_identifier': 'https://ror.org/027bh9e22', 'study_pi_affiliation_identifier_scheme': 'ROR', 'study_pi_affiliation_identifier_schemeuri': 'https://ror.org/', 'study_pi_identifier_schemeuri': 'https://orcid.org/', 'study_pi_identifier_type': 'ORCID', 'study_pi_name': 'van IJzendoorn, Marinus', 'study_pi_pid': '0000-0003-1144-454X'}, {'study_pi_affiliation': 'Leiden University, Erasmus University Rotterdam', 'study_pi_affiliation_identifier': 'https://ror.org/027bh9e22', 'study_pi_affiliation_identifier_scheme': 'ROR', 'study_pi_affiliation_identifier_schemeuri': 'https://ror.org/', 'study_pi_identifier_schemeuri': 'https://orcid.org/', 'study_pi_identifier_type': 'ORCID', 'study_pi_name': 'Crone, Eveline', 'study_pi_pid': '0000-0002-7508-6078'}, {'study_pi_affiliation': 'Leiden University, Vrije Universiteit Amsterdam', 'study_pi_affiliation_identifier': 'https://ror.org/027bh9e22', 'study_pi_affiliation_identifier_scheme': 'ROR', 'study_pi_affiliation_identifier_schemeuri': 'https://ror.org/', 'study_pi_identifier_schemeuri': 'https://orcid.org/', 'study_pi_identifier_type': 'ORCID', 'study_pi_name': 'Bakermans-Kranenburg, Marian', 'study_pi_pid': '0000-0001-7763-0711'}, {'study_pi_affiliation': 'Leiden University, Erasmus University Rotterdam', 'study_pi_affiliation_identifier': 'https://ror.org/027bh9e22', 'study_pi_affiliation_identifier_scheme': 'ROR', 'study_pi_affiliation_identifier_schemeuri': 'https://ror.org/', 'study_pi_identifier_schemeuri': 'https://orcid.org/', 'study_pi_identifier_type': 'ORCID', 'study_pi_name': 'Engels, Rutger', 'study_pi_pid': '0000-0003-1944-9126'}], 'study_publisher': [{'study_publisher_identifier': 'https://ror.org/027bh9e22', 'study_publisher_identifier_schemeuri': 'https://ror.org/', 'study_publisher_identifier_type': 'ROR', 'study_publisher_name': 'Leiden University'}, {'study_publisher_identifier': 'https://ror.org/05xvt9f17', 'study_publisher_identifier_schemeuri': 'https://ror.org/', 'study_publisher_identifier_type': 'ROR', 'study_publisher_name': 'Leiden University Medical Center'}], 'study_references': [{'study_reference_citation': 'Crone, E. A., Achterberg, M., Dobbelaar, S., Euser, S., van den Bulk, B., van der Meulen, M., ... & van IJzendoorn, M. H. (2020). Neural and behavioral signatures of social evaluation and adaptation in childhood and adolescence: the Leiden consortium on individual development (L-CID). Developmental Cognitive Neuroscience, 45, 100805. https://doi.org/10.1016/j.dcn.2020.100805', 'study_reference_identifier': 'https://doi.org/10.1016/j.dcn.2020.100805', 'study_reference_identifier_type': 'DOI', 'study_reference_type': 'IsDescribedBy'}, {'study_reference_citation': 'Euser, S., Bakermans-Kranenburg, M. J., van den Bulk, B. G., Linting, M., Damsteegt, R. C., Vrijhof, C. I., ... & van IJzendoorn, M. H. (2016). Efficacy of the Video-feedback Intervention to promote Positive Parenting and Sensitive Discipline in Twin Families (VIPP-Twins): Study protocol for a randomized controlled trial. BMC Psychology, 4(1), 1-11. https://doi.org/10.1186/s40359-016-0139-y', 'study_reference_identifier': 'https://doi.org/10.1186/s40359-016-0139-y', 'study_reference_identifier_type': 'DOI', 'study_reference_type': 'IsDescribedBy'}]}]
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EEG - Resting state

Leiden Consortium on Individual Development Cohort study

L-CID: Early Childhood Cohort Cohort

ECC - T2 Wave

ECC - T3 Wave