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| mrepo:topics:childhoodcognitiveability [02/03/2018 @ 12:00] – adammoore | mrepo:topics:childhoodcognitiveability [14/11/2023 @ 12:20] (current) – director |
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| ==== Childhood Cognitive Ability ==== | ==== Childhood Cognitive Ability ==== |
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| The cognitive tests administered in childhood and adolescence in NSHD were all ones of intellectual ability; tests of functional performance (memory, speed of processing, executive function, etc.) were first given at [[questionnaires:1989|age 43 years]] | The cognitive tests administered in childhood and adolescence in NSHD were all ones of intellectual ability; tests of functional performance (memory, speed of processing, executive function, etc.) were first given at [[questionnaires:1989|age 43 years]] |
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| At age 15 three tests were administered.<html><br></html> 1. the Heim Group Ability Test AH4 (Heim, 1970), a 130-item test requiring shape matching and selection, and verbal and number problems, yielding scores for Verbal Intelligence and Non-verbal Intelligence; <html><br></html> 2. the Watts-Vernon Reading Test, a 35-item test of reading comprehension requiring the participant to select an appropriate word to complete a sentence; <html><br></html> 3. a 47-item mathematics test, requiring the use of arithmetic, geometry, trigonometry and algebra.<html><br></html> | At age 15 three tests were administered:<html><br></html> 1. The Heim Group Ability Test AH4 (Heim, 1970), a 130-item test requiring shape matching and selection, and verbal and number problems, yielding scores for Verbal Intelligence and Non-verbal Intelligence <html><br></html> 2. The Watts-Vernon Reading Test, a 35-item test of reading comprehension requiring the participant to select an appropriate word to complete a sentence <html><br></html> 3. A 47-item mathematics test, requiring the use of arithmetic, geometry, trigonometry and algebra<html><br></html> |
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| Scores for all of these tests are also available in normalised form for approximation to a standard IQ score.<html><br></html> | Scores for all of these tests are also available in <html><b>normalised</b></html> form for approximation to a standard IQ score.<html><br></html> |
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| Since these cognitive tests are highly inter-correlated, simple global scores can be calculated by summing the scores at each age. If this is done it is recommended that each score is first standardised to a z score to allow for the varying ranges across the raw test scores, in the following way:<html><br></html> | Since these cognitive tests are highly inter-correlated, simple global scores can be calculated by summing the scores at each age. If this is done it is recommended that each score is <html><b>first standardised</b></html> to a z-score to allow for the varying ranges across the raw test scores, in the following way:<html><br></html> |
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| Subtract the mean score (based on the analytic sample) from the individual score, then divide the difference by the standard deviation of the mean score. | Subtract the mean score (based on the analytic sample) from the individual score, then divide the difference by the standard deviation of the mean score |
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| Sum the resulting z scores, then re-standardise this total score. | Sum the resulting z-scores, then re-standardise this total score |
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| <HTML> | === Obtaining the standard childhood cognitive ability variables === |
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| | * You can obtain a list of the standard topic variables to use in an NSHD data sharing request by selecting the link below.\\ |
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| | **Please Note** that the childhood cognitive ability standard basket only contains the three summary, standardised //**COG..H**// variables, which are the most commonly-used covariates on this topic. For the full, detailed variable list please investigate this subject on [[skylark:skylark|Skylark]]. |
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| | <html><b></html>{{mrepo:childhood_cognition.pdf|More information}} <html></b></html>is available on this topic - including the main variable naming conventions and some value labels. |
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| | [[https://skylark.ucl.ac.uk/Sparrow/search/html/keyword/mrepo:topics:childhoodcognitiveability | HTML version of the standard variables to view]] |
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| <td><small><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/childhood.html">Childhood | |
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| <td><small><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/Adult_Health.html">Adult Physical | |
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| <td><small><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/Adult_Wellbeing.html">Adult Mental Function & Wellbeing</a></small></td> | |
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| <td><small><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/Adult_Behaviours.html">Adult Health | |
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| <td><small><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/Anthropometry.html"><span style="text-decoration: underline;">Anthropometry</span></a></small></td> | |
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| <td><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/Lifetime.html"><small>Lifetime | |
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| <td><small><img style="width: 11px; height: 11px;" alt="arrow" src="./Childhood Cognitive Ability_files/link_icon.gif"><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/Biological.html">Biological | |
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| <html><a href="https://secure.ctu.mrc.ac.uk/lha_nshd/members/index.html"></html>Homepage<html></a></html> | <html><a href="http://www.nshd.mrc.ac.uk/"></html>LHA-NSHD Website (Public)<html></a></html> | |
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