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| cogstate [2025/04/16 12:08] – jasper_zwerver | cogstate [2026/01/28 09:13] (current) – jasper_zwerver |
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| ====== Cogstate ====== | ====== Cogstate ====== |
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| The [[http://www.cogstate.com|Cogstate]] is a battery of computerized cognitive tests used in [[start|Lifelines]] to broadly assess cognitive functioning of participants ([[sections|section]]: [[mental health]]). The test battery was performed in ~68,000 able participants aged 13 years and older during [[2A Visit 1]], and is used again in the ongoing assessment [[3A]].\\ | The [[http://www.cogstate.com|Cogstate]] is a battery of computerized cognitive tests used in [[start|Lifelines]] to broadly assess cognitive functioning of participants ([[sections|section]]: [[mental health]]). The test battery was performed in ~92,000 able participants aged 13 years and older during [[2A Visit 1]], and ~76,000 able participants aged 13 years and older during [[3A Visit 1]].\\ |
| The Cogstate is used in conjunction with other cognition tests in Lifelines, i.e. the [[Ruff Figural Fluency Test|RFFT]] and the [[Mini Mental State Examination|MMSE]]. Raw data of the Cogstate was used to calculate the [[Cogstate Speed Composite (CSC)]]. | The Cogstate is used in conjunction with other cognition tests in Lifelines, i.e. the [[Ruff Figural Fluency Test|RFFT]] and the [[Mini Mental State Examination|MMSE]]. Raw data of the Cogstate was used to calculate the [[Cogstate Speed Composite (CSC)]]. |
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| __Responsiveness__ of the instrument has been assessed by measuring decline in cognitive performance of patients with mild Alzheimer’s Disease on the International Shopping List Test (ISLT); a subtest of the Cogstate((Lim, Y. Y., Pietrzak, R. H., Snyder, P. J., Darby, D., & Maruff, P. (2012). Preliminary data on the effect of culture on the assessment of alzheimer's disease-related verbal memory impairment with the international shopping list test. Archives of Clinical Neuropsychology : The Official Journal of the National Academy of Neuropsychologists, 27(2), 136-147)). Results show that compared to controls, patients with Alzheimer’s Disease show deterioration in verbal memory over a period of one year. We would expect similar results on all other subtests of the CogState suggesting that the Cogstate is sensitive to changes in cognitive functioning in persons with Alzheimer’s disease. A longer period of follow-up would be needed to be able to say something about responsiveness among the general population (i.e. persons without cognitive impairments). | __Responsiveness__ of the instrument has been assessed by measuring decline in cognitive performance of patients with mild Alzheimer’s Disease on the International Shopping List Test (ISLT); a subtest of the Cogstate((Lim, Y. Y., Pietrzak, R. H., Snyder, P. J., Darby, D., & Maruff, P. (2012). Preliminary data on the effect of culture on the assessment of alzheimer's disease-related verbal memory impairment with the international shopping list test. Archives of Clinical Neuropsychology : The Official Journal of the National Academy of Neuropsychologists, 27(2), 136-147)). Results show that compared to controls, patients with Alzheimer’s Disease show deterioration in verbal memory over a period of one year. We would expect similar results on all other subtests of the CogState suggesting that the Cogstate is sensitive to changes in cognitive functioning in persons with Alzheimer’s disease. A longer period of follow-up would be needed to be able to say something about responsiveness among the general population (i.e. persons without cognitive impairments). |
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| __Cogstate in Lifelines__: correlations between the Cogstate and [[Ruff Figural Fluency Test|RFFT]] scores are described in a paper by Kuiper et al. ((Kuiper, J.S., Oude Voshaar, R.C., Verhoeven, F.E.A., Zuidema, S.U., and Smidt, N. (2017). Comparison of cognitive functioning as measured by the Ruff Figural Fluency Test and the Cogstate computerized battery within the LifeLines Cohort Study. BMC Psychol. 5, 15)) | __Cogstate in Lifelines__: |
| | For some variables, Lifelines used the outcome metrics defined by Cogstate. Specifically, reaction-time measures were summarized as the mean log10 reaction time for correct trials, and accuracy measures as arcsine(√proportion-correct). These transformations are specified on the Cogstate test pages and are standard in Cogstate datasets to address distributional properties typical of cognitive data and to support comparability across studies. |
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| | Correlations between the Cogstate and [[Ruff Figural Fluency Test|RFFT]] scores are described in a paper by Kuiper et al. ((Kuiper, J.S., Oude Voshaar, R.C., Verhoeven, F.E.A., Zuidema, S.U., and Smidt, N. (2017). Comparison of cognitive functioning as measured by the Ruff Figural Fluency Test and the Cogstate computerized battery within the LifeLines Cohort Study. BMC Psychol. 5, 15)) |
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| ===== Versions ===== | ===== Versions ===== |
| The Cogstate brief battery was measured during [[2A Visit 1]] and [[3A Visit 1]]. During the third assessment ([[3A]]) the test was redesigned by the Cogstate research group. The test and protocol stayed the same for the participants, however more variables were measured during the test.\\ | The Cogstate brief battery was measured during [[2A Visit 1]] and [[3A Visit 1]]. During the third assessment ([[3A]]) the test was redesigned by the Cogstate research group. The test and protocol stayed the same for the participants, however more variables were measured during the test.\\ |
| In [[2A Visit 1]] around 92.000 participants had valid Cogstate results. In [[3A Visit 1]] around 15.000 participants had valid results on the original brief battery and 24.000 on the redesigned version. At this moment assessment 3A is still going on, meaning the redesigned version number will increase overtime. | In [[2A Visit 1]] ~92.000 participants had valid Cogstate results. In [[3A Visit 1]] ~15.000 participants had valid results on the original brief battery and ~61.000 on the redesigned version. |
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| === Variable suffixes === | === Variable suffixes === |
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| | **Task in order of completion** | **Suffix** | | | **Task in order of completion** | **Suffix** | |
| | Detection task | _02 | | | Detection task | _02 | |
| | Identification task | _01 | | | Identification task | _01 | |
| | One back task | _04 | | | One back task | _04 | |
| | One Card Learning task | _03 | | | One Card Learning task | _03 | |
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