The goal of this accelerated longitudinal observational cohort study is to advance our understanding of cognitive variability in children aged 7 to 10 at first measurement. The CODEC study aims to integrate experience sampling methods, longitudinal designs, deep phenotyping cohorts, and state-of-the-art statistical methodologies to investigate three core questions: 1. How does cognitive variability differ between individuals? 2. What are the neural, psychological, and environmental mechanisms that underlie cognitive variability? 3. What are the long-term consequences and outcomes associated with differences in cognitive variability?
Study Type
OBSERVATIONAL
Enrollment
600
Radboudumc Department of Cognitive Neuroscience
Nijmegen, Netherlands
RECRUITINGReaction times from the vocabulary cognitive task
RT from accurate responses from the vocabulary task in the cognitive battery during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
Reaction times from the exploration cognitive task
RT from accurate responses from the exploration task in the cognitive battery during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
Reaction times from the Working Memory cognitive task
RT from accurate responses from the WM task in the cognitive battery during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
Reaction times from the speed cognitive task
RT from accurate responses from the speed raction time task in the cognitive battery during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
Reaction times from the fluid reasoning cognitive task
RT from accurate responses from the fluid reasoning task in the cognitive battery during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
Mood score on smiley slider
The current mood of the participant on a smiley slider from 0-100 during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
Sleep score on smiley slider
The current level of tiredness of the participant on a smiley slider from 0-100 during burst assessment (3x a day, 5x a week) and up to 2 additional occasions per year.
Time frame: Through study completion, an average of 3 years
MP-RAGE MRI sequence baseline
Structural MP-RAGE MRI scan at baseline measurement
Time frame: an average of 1 year
Functional MRI sequence of low time constraint reasoning task at baseline
Functional MRI scan at baseline measurement when participants perform fluid reasoning task with low time contraint.
Time frame: an average of 1 year
gaze direction during reasoning task at baseline
gaze direction recording through eye-tracking at baseline measurement when participants perform fluid reasoning task.
Time frame: an average of 1 year
pupil dilation during reasoning task at baseline
pupil dilation recording through eye-tracking at baseline measurement when participants perform fluid reasoning task.
Time frame: an average of 1 year
Naturalistic viewing fMRI at baseline
Naturalistic viewing fMRI at baseline measurement.
Time frame: an average of 1 year
Naturalistic viewing fMRI at follow-up
Naturalistic viewing fMRI at follow-up measurement.
Time frame: two years after baseline
Functional MRI sequence of high time constraint reasoning task at follow-up
Functional MRI scan at follow-up measurement when participants perform fluid reasoning task with high time contraint.
Time frame: two years after baseline
gaze direction during reasoning task at baseline at follow-up
gaze direction recording through eye-tracking at follow-up measurement when participants perform fluid reasoning task.
Time frame: two years after baseline
pupil dilation during reasoning task at baseline at follow-up
pupil dilation recording through eye-tracking at follow-up measurement when participants perform fluid reasoning task.
Time frame: two years after baseline
Functional MRI sequence of low time constraint reasoning task at follow-up
Functional MRI scan at follow-up measurement when participants perform fluid reasoning task with low time contraint.
Time frame: two years after baseline
Sparse MP2-Rage MRI sequence baseline
Structural Sparse MP2-Rage MRI scan at baseline measurement
Time frame: an average of 1 year
Diffusion weighted imaging MRI sequence baseline
Diffusion weighted imaging MRI scan at baseline measurement
Time frame: an average of 1 year
MP-RAGE MRI sequence follow up
Structural MP-RAGE MRI scan at follow up measurement
Time frame: two years after baseline
Sparse MP2-Rage MRI sequence follow up
Structural Sparse MP2-Rage MRI scan at follow up measurement
Time frame: two years after baseline
Diffusion weighted imaging MRI sequence follow up
Diffusion weighted imaging MRI scan at follow up measurement
Time frame: two years after baseline
Total score for Highly Sensitive Child scale at baseline
Participant reported 12-item Dutch version of the HSC scale measured at baseline. Each item is scored on a scale from 1-strongly disagree to 7-strongly agree
Time frame: an average of 1 year
Total score for Strengths and difficulties questionnaire at baseline
Parent reported 25-item Dutch version of the SDQ measured at baseline. Each item is scored (0-not at all/only a little, 1-quite a lot, 2-a great deal)
Time frame: an average of 1 year
Total score for BRIEF-2 questionnaire at baseline
Parent reported Dutch version of the Behaviour Rating Inventory of Executive Function 2 measured at baseline.
Time frame: an average of 1 year
Total score for BRIEF-2 questionnaire at follow-up
Parent reported Dutch version of the Behaviour Rating Inventory of Executive Function 2 measured at follow-up.
Time frame: two years after baseline
Total score for Strengths and difficulties questionnaire at follow-up
Parent reported 25-item Dutch version of the SDQ measured at follow-up. Each item is scored (0-not at all/only a little, 1-quite a lot, 2-a great deal)
Time frame: two years after baseline
Total score for Mind Excessively Wandering Scale scale at baseline
Participant reported 12-item Dutch version of the MEWS scale measured at baseline. Each item is scored on a scale from 0 (not at all or rarely) to 3 (nearly all of the time or constantly)
Time frame: an average of 1 year
Originality score for the Alternative Uses Tasks at baseline
Originality score of responses on an alternative uses task at baseline.
Time frame: an average of 1 year
Originality score for the Alternative Uses Tasks at follow-up
Originality score of responses on an alternative uses task at follow-up.
Time frame: two years after baseline
Total score for Parent-reported Mind Excessively Wandering Scale scale at baseline
Parent reported 12-item Dutch version of the MEWS scale measured at baseline. Each item is scored on a scale from 0 (not at all or rarely) to 3 (nearly all of the time or constantly)
Time frame: an average of 1 year
Total score for Parent-reported Socio-demographic questionnaire at baseline
Parent reported socio-demograpic questionnaire at baseline. Total score on SES related questions (highest level of educationm professional situation) will be measured.
Time frame: an average of 1 year
Total score for Parent-reported Socio-demographic questionnaire at follow-up
Parent reported socio-demograpic questionnaire at baseline. Total score on SES related questions (highest level of education, professional situation) will be measured.
Time frame: two years after baseline
Total score for Mind Excessively Wandering Scale scale at follow-up
Participant reported 12-item Dutch version of the MEWS scale measured at follow-up. Each item is scored on a scale from 0 (not at all or rarely) to 3 (nearly all of the time or constantly)
Time frame: two years after baseline
Total score for Parent-reported Mind Excessively Wandering Scale scale at follow-up
Parent reported 12-item Dutch version of the MEWS scale measured at follow-up. Each item is scored on a scale from 0 (not at all or rarely) to 3 (nearly all of the time or constantly)
Time frame: two years after baseline
Total score for Highly Sensitive Child scale at follow-up
Participant-reported 12-item Dutch version of the HSC scale measured at follow-up. Each item is scored on a scale from 1-strongly disagree to 7-strongly agree
Time frame: two years after baseline
motivation rating for cognitive tasks
Rating from least to most fun cognitive task once a year after completing the cognitie battery 10 times in the burst week
Time frame: Through study completion, an average of 3 years
Decibel of background noise during cognitive testing
DB recording of background noise when performing the cognitive tasks at the start of the testing
Time frame: Through study completion, an average of 3 years
Academic school result baseline
cito-scores, academic results on national test obtained through schools at baseline
Time frame: an average of 1 year
Academic school result follow-up
cito-scores, academic results on national test obtained through schools at follow-up
Time frame: two years after baseline
Parent reaction times on cognitive battery at baseline
Parents performed RT on accurate responses in measures on the complete cognitive battery (vocabulary, reasoning, exploration, working memory and speed) at baseline
Time frame: an average of 1 year
Parent reaction times on cognitive battery at follow-up
Parents performed RT on accurate responses in measures on the complete cognitive battery (vocabulary, reasoning, exploration, working memory and speed) at follow-up
Time frame: two years after baseline
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