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==== Data collections ==== | ==== Data collections ==== | ||
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There have been 24 waves of data collected on the whole cohort between 1946 and 2018. In addition there have been smaller collections conducted on various sub-groups. | There have been 24 waves of data collected on the whole cohort between 1946 and 2018. In addition there have been smaller collections conducted on various sub-groups. | ||
- | Data were collected by contacts with study members themselves as well as through questions answered by their parents, school teachers, school doctors and nurses, and youth employment officers. | + | Data were collected by contacts with study members themselves as well as through questions answered by their parents, school teachers, school doctors and nurses, and youth employment officers. |
- | Between the ages of 0 and 15 information was collected from the parent, most usually the mother. | + | Between the ages of 0 and 15 information was collected from the parent, most usually the mother. |
- | Between the ages of five and 15 some information was collected from the study members themselves, usually in the form of cognitive tests. | + | Between the ages of five and 15 some information was collected from the study members themselves, usually in the form of cognitive tests. |
Since the age of 16, information has been collected from interviews with study members. A future data collection is planned from 2019 - 2022. | Since the age of 16, information has been collected from interviews with study members. A future data collection is planned from 2019 - 2022. | ||