Dataset

Verbal Fluency Test

The Verbal Fluency Test assesses how many words that belong to the same predetermined category participants can produce in a given time (usually 60 seconds). This category can be semantic, specified objects such as animals or fruits, or phonological, words beginning with a specified letter such as p.

In NTR, there were two letter categories, namely ‘r’ and ‘t’, and two subject categories, namely ‘animals’ and ‘professions’.

Labels	intelligence iq executive functioning cognitive control vocabulary verbal fluency verbal intelligence language memory
Constructs	cognition
Available measurements	Young Netherlands Twin Register YC_BS2 C S 12.0 years From 2007-01-01 to 2009-01-01 YE_COG18 C S 18.0 years From 2004-01-01 to 2006-01-01
Mode of collection	MeasurementsAndTests Behavioral/cognitive task
References	Lezak, Muriel Deutsch (1995). Neuropsychological assessment. Oxford [Oxfordshire]: Oxford University Press. ISBN 978-0-19-509031-4

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

author	None
author_email	None
creator_user_id	6c404c5c-dbec-4933-bc54-0b7656c773ba
dc_additional_info	In NTR, there were two letter categories, namely ‘r’ and ‘t’, and two subject categories, namely ‘animals’ and ‘professions’.
dc_analysis_unit	[]
dc_cohort	NTR
dc_common_id	0120_CD2
dc_mode_of_collection	MeasurementsAndTests
dc_mode_of_collection_sub	Behavioral/cognitive task
id	869e970a-7cf0-47f5-8ebd-da499b8f65bf
isopen	False
license_title	None
maintainer	None
maintainer_email	None
metadata_created	2023-03-28T10:01:54.019705
metadata_modified	2023-04-04T12:49:22.262493
name	61c05d9f9673d54ff1cd18eeb574d309
notes	The Verbal Fluency Test assesses how many words that belong to the same predetermined category participants can produce in a given time (usually 60 seconds). This category can be semantic, specified objects such as animals or fruits, or phonological, words beginning with a specified letter such as p.
num_resources	0
num_tags	0
organization	{'id': '1c79e3cf-de04-4f4c-aa77-46aff3228db4', 'name': 'ntr', 'title': 'NTR', 'type': 'organization', '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 behavioural 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 behavioural traits and mental and physical health. In the CD2 portal, 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).', 'image_url': 'https://beta.data.individualdevelopment.nl/img/logo_ntr.png', 'created': '2023-03-06T15:49:42.299075', 'is_organization': True, 'approval_status': 'approved', 'state': 'active'}
owner_org	1c79e3cf-de04-4f4c-aa77-46aff3228db4
private	False
state	active
title	Verbal Fluency Test
type	dataset
dc_constructs	[{'dc_construct': 'cognition'}]
dc_labels	[{'dc_label': 'intelligence'}, {'dc_label': 'iq'}, {'dc_label': 'executive functioning'}, {'dc_label': 'cognitive control'}, {'dc_label': 'vocabulary'}, {'dc_label': 'verbal fluency'}, {'dc_label': 'verbal intelligence'}, {'dc_label': 'language'}, {'dc_label': 'memory'}]
dc_measurement_references	[{'dc_measurements_references_citation': 'Lezak, Muriel Deutsch (1995). Neuropsychological assessment. Oxford [Oxfordshire]: Oxford University Press. ISBN 978-0-19-509031-4', 'dc_measurements_references_doi': 'https://doi.org/10.1348/014466500163202'}]
measure_age_range	[{'measure_age_month': 144}, {'measure_age_month': 216}]
wave	[{'wave_ckan_id': 'c5467bc75c9c3b0964e9d728cd3d56f0', 'wave_cohort': 'NTR: Young Netherlands Twin Register', 'wave_cohort_ckan_id': '6f88a94b0bf79a8304ba604c655c08a9', 'wave_description': '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 three years after baseline, around the 12th birthday of the twins. Data collection included psychometric IQ tests, a comprehensive neuropsychological testing protocol, and parental and self-ratings of behavioral and emotional problems. Physical maturation was measured through assessment of Tanner stages. Hormonal levels (cortisol, luteinizing hormone, follicle-stimulating hormone, testosterone, and estrogens) were assessed in urine and saliva. Brain scans were acquired using 1.5 Tesla Magnetic Resonance Imaging (MRI), which provided volumetric measures and measures of cortical thickness. Buccal swabs were collected for DNA isolation for future candidate gene and genome-wide analysis studies.', 'wave_end_date_collection': '2009-01-01', 'wave_start_date_collection': '2007-01-01', 'wave_subject_codes': ['C', 'S'], 'wave_title': 'YC_BS2', 'wave_universe': '144'}, {'wave_ckan_id': '8fb82c775194379af04d33ee9bba53db', 'wave_cohort': 'NTR: Young Netherlands Twin Register', 'wave_cohort_ckan_id': '6f88a94b0bf79a8304ba604c655c08a9', 'wave_description': 'This project is the fifth measurement of a longitudinal study into the development of intelligence and problem behaviour (waves one and two not included in CD2) to which additional participants were recruited (twins with siblings and their parents). The test protocol consisted of a physical part and a psychological part. Physical measurements included cardiovascular functioning (assessed with the VU-AMS device), a physical examination with basic anthropometric measurements and the collection of saliva, DNA and fingerprints. The psychological part consisted of a series of cognitive tests that measured the following abilities: intelligence (Wechsler Intelligence Scale for Children, WISC-R or Revised Amsterdamse Kinder Intelligentie Test, RAKIT); inhibition (Stroop); spontaneous production of words (Verbal fluency); verbal learning and memory (California Verbal Learning Task, CVLT); emotion recognition (Reading the mind in the eyes); perceptual speed (Π inspection time task); spatial short term memory (n-back task and Corsi block tapping task). Furthermore, some questionnaires were administered to the participants (Autism-Spectrum Quotient, Tanner self-report), mothers of the twins (Social Responsiveness Scale) and research assistants (Test Observation form).', 'wave_end_date_collection': '2006-01-01', 'wave_start_date_collection': '2004-01-01', 'wave_subject_codes': ['C', 'S'], 'wave_title': 'YE_COG18', 'wave_universe': '216'}]
resources	[]
tags	[]
groups	[]
relationships_as_subject	[]
relationships_as_object	[]
tracking_summary	{'total': 32, 'recent': 2}