The Avon Longitudinal Study of Parents and Children (ALSPAC) assessed their cohort members (CMs) during the study’s age 7.5 sweep (Focus@7) using the Letter Decision Task.
Details on this measure and the data collected from the CMs are outlined in the table below.
|CHC:||Gs (Processing Speed)|
|Gv (Visual Processing)|
|Administration method:||Trained interviewer; clinical setting; pen and paper|
|Procedure:||The child was presented with a series of shapes, half of which were real letters, and half which were non-letters (including reversed letters). They were instructed to go through the list, placing a tick next to genuine letters and a cross next to non-letters. The speed of completion was recorded. This test was completed only by children who had struggled with other tasks, and thus the sample is considerably biased.|
|Link to questionnaire:||http://www.bristol.ac.uk/alspac/researchers/our-data/clinical-measures/ (opens in new tab)|
|Scoring:||The main score was the number of correct responses (0 - 40)|
|Item-level variable(s):||Not readily available|
|Total score/derived variable(s):||f7ws300 - f7ws348|
|N = 586|
|Range = 0 - 40|
|Mean = 34.19|
|SD = 5.71|
|(click image to enlarge)
|Age of participants:||Mean = 90.5 months, SD =3.83, Range = 82 - 113|
|Other sweep and/or cohort:||None|
|Source:||(Gathercole & Baddeley, 1997, personal communication)|
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’.