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Table 3 Example of process to identify linking units and ICF-CY codes (Part I) and ‘visual ability’ themes & categories (Part II)

From: Methods for conceptualising ‘visual ability’ as a measurable construct in children with cerebral palsy

Part I Part II
     Descriptive theme Analytical theme
Measure Item Linking unita ICF-CY codeb Descriptive word for visual ability Indicator of visual ability Theme: Observable visual behaviour Category of visual ability behaviour
CVI Q [16] Manipulates an object rather than look at it
(Item 40, Other senses domain)
Use of other senses d110 Watching
d1201 Touchingc
Look Look at object
Manipulate rather than look (other senses)
Watches and/or visually interacts with objects
Frequency of use of vision in activities
Interactions
Use of vision
FVQ [18] Tracks an object/toy (Item 2) Tracking d110 Watching Tracking Tracks an object/toy Follows Abilities
       Watches and/or visually interacts with objects Interactions
PreViAs [24] Is he/she able to look towards a sound source? (Item 3) Looking toward a sound sourced d110 Watching
b2302 Localisation of a sound source
Look Looks toward sound source Searches Abilities
VSI [36] Does your child reach for a large, bright, silent object? (Item 17) Reaching d4452 Reaching n/a    
  1. aLinking unit = What is the item about?; bOnly assessment items which have been linked to an ICF-CY ‘visual ability’ code of d110 Watching, d160 Focusing attention or d161 Directing attention are included in Part II; cThis is an example where the exact term in the ICF-CY does not match the construct as described in the measure i.e., linked to d1201 Touching and not d4402 Manipulating; dExample of an item where it was not easy to identify what the item was about e.g., is it about ‘Turning to look’?, ‘Hearing a sound’ or ‘Looking’