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| ID | Type | Description | Link |
|---|---|---|---|
| 101040534 | Other Grant/Funding Number | European Research Council |
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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:
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Design | Behavioural or behavioural with imaging |
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| Measure | Description | Time Frame |
|---|---|---|
| Reaction 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. | 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. | 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. | 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. | 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. | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| 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 | Through study completion, an average of 3 years |
| Decibel of background noise during cognitive testing |
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Inclusion Criteria:
In order to be eligible to participate in the behavioural arm of this study, a subject must meet all of the following criteria:
Exclusion Criteria:
A potential subject will be excluded from participation in the study if the participant indicates not understanding the instructions of the behavioural tasks due to a language barrier. In the imaging arm of the study, a potential subject who meets any of the following criteria will further be excluded from participation in the imaging arm of the study:
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600 children will be recruited from schools and on individual bases to take part in the behavioural testing. A subgroup of 200 children will be further recruited to participate in the imaging part of the study at the Donders Institute.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Rogier Kievit | Contact | +31 (0) 24 361 42 24 | rogier.kievit@donders.ru.nl | |
| Ilse Coolen | Contact | ilse.coolen@radboudumc.nl |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Radboudumc Department of Cognitive Neuroscience | Recruiting | Nijmegen | 6525 EN | Netherlands |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 39060934 | Derived | Coolen IEJI, van Langen J, Hofman S, van Aagten FE, Schaaf JV, Michel L, Aristodemou M, Judd N, van Hout ATB, Meeussen E, Kievit RA. Protocol and preregistration for the CODEC project: measuring, modelling and mechanistically understanding the nature of cognitive variability in early childhood. BMC Psychol. 2024 Jul 26;12(1):407. doi: 10.1186/s40359-024-01904-5. |
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| 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. | Through study completion, an average of 3 years |
| MP-RAGE MRI sequence baseline | Structural MP-RAGE MRI scan at baseline measurement | 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. | 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. | 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. | an average of 1 year |
| Naturalistic viewing fMRI at baseline | Naturalistic viewing fMRI at baseline measurement. | an average of 1 year |
| Naturalistic viewing fMRI at follow-up | Naturalistic viewing fMRI at follow-up measurement. | 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. | 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. | 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. | 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. | two years after baseline |
| Sparse MP2-Rage MRI sequence baseline | Structural Sparse MP2-Rage MRI scan at baseline measurement | an average of 1 year |
| Diffusion weighted imaging MRI sequence baseline | Diffusion weighted imaging MRI scan at baseline measurement | an average of 1 year |
| MP-RAGE MRI sequence follow up | Structural MP-RAGE MRI scan at follow up measurement | two years after baseline |
| Sparse MP2-Rage MRI sequence follow up | Structural Sparse MP2-Rage MRI scan at follow up measurement | two years after baseline |
| Diffusion weighted imaging MRI sequence follow up | Diffusion weighted imaging MRI scan at follow up measurement | 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 | 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) | 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. | 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. | 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) | 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) | 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. | 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. | 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) | 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. | 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. | 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) | 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) | 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 | two years after baseline |
DB recording of background noise when performing the cognitive tasks at the start of the testing |
| Through study completion, an average of 3 years |
| Academic school result baseline | cito-scores, academic results on national test obtained through schools at baseline | an average of 1 year |
| Academic school result follow-up | cito-scores, academic results on national test obtained through schools at follow-up | 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 | 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 | two years after baseline |