The Avon Longitudinal Study of Parents and Children (ALSPAC) assessed their cohort members (CMs) during the study’s age 8.5 sweep (Focus@8) using the Coding measure from the Wechsler Intelligence Scale for Children (WISC-III).
Details on this measure and the data collected from the CMs are outlined in the table below.
|Short-term visual memory|
|CHC:||Gv (Visual Processing)|
|Gs (Processing Speed)|
|Administration method:||Trained interviewer; clinical setting; pen and paper|
|Procedure:||The child was shown a key which contained geometric shapes, each of which was marked by a symbol. Next they were presented with rows and columns containing only the geometric shapes, and were tasked with marking each one with the appropriate symbol. Sample items were administered first.|
|Duration: The actual trial lasted for 120 seconds.|
|Link to questionnaire:||http://www.bristol.ac.uk/alspac/researchers/our-data/clinical-measures/ (opens in new tab)|
|Scoring:||One point was awarded for each correctly drawn symbol, and these were converted to standardised scores (M = 10, SD = 3) using the WISC manual.|
|Item-level variable(s):||Not readily available|
|Total score/derived variable(s):||f8ws027 - f8ws057|
|Descriptives:||Raw score||Scaled score|
|N = 7,404||N = 7,403|
|Range = 0 - 99||Range = 1 - 19|
|Mean = 34.52||Mean = 10.49|
|SD = 7.45||SD = 3.04|
|(click image to enlarge)||(click image to enlarge)
|Age of participants:||Mean = 103.82 months, SD = 3.92, Range = 89 - 127|
|Other sweep and/or cohort:||None|
|Source:||Wechsler, D. (1991). WISC-III: Wechsler intelligence scale for children: Manual. Psychological Corporation.|
|Technical resources:||Kaufman, A. S., & Lichtenberger, E. O. (2000). Essentials of WISC-III and WPPSI-R assessment. John Wiley & Sons Inc.|
|Reference examples:||Horwood, J., Salvi, G., Thomas, K., Duffy, L., Gunnell, D., Hollis, C., ... & Zammit, S. (2008). IQ and non-clinical psychotic symptoms in 12-year-olds: results from the ALSPAC birth cohort. The British Journal of Psychiatry, 193(3), 185-191.|
|Bornstein, M. H., Hahn, C. S., & Wolke, D. (2013). Systems and cascades in cognitive development and academic achievement. Child Development, 84(1), 154-162.|
For the named items in the table above, links are provided to their corresponding content on CLOSER Discovery. Where a variable range is provided, full variable lists can be accessed through the ‘Variable Groups’ tab on the linked Discovery page.
- Overview of all cognitive measures in ALSPAC
- Overview of childhood cognitive measures across all studies
This page is part of CLOSER’s ‘A guide to the cognitive measures in five British birth cohort studies’.