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State of the World's Children 2013 - Unicef

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<strong>of</strong> enumeration, such as censuses, general and<br />

targeted household surveys, and interviews with<br />

key informants, have been used to estimate<br />

disability prevalence.<br />

General data collection instruments are likely to<br />

underestimate <strong>the</strong> number <strong>of</strong> children with disabilities.<br />

124 They typically employ a generic or<br />

filter question, such as whe<strong>the</strong>r anyone in <strong>the</strong><br />

household ‘is disabled’, or use <strong>the</strong> same questions<br />

for all household members regardless <strong>of</strong><br />

<strong>the</strong>ir age. <strong>Children</strong> in particular are likely to be<br />

overlooked in surveys that do not specifically ask<br />

about <strong>the</strong>m. 125<br />

Targeted household surveys that specifically<br />

address <strong>the</strong> issue <strong>of</strong> child disability or include<br />

measures specifically designed to evaluate disability<br />

in children have produced more accurate<br />

results than household surveys or censuses that<br />

ask about disability in general. 126 Such surveys<br />

tend to report higher prevalence rates because<br />

<strong>the</strong>y usually include more numerous and<br />

detailed questions.<br />

Questionnaire design<br />

Even well-designed surveys can misreport disability<br />

if a single set <strong>of</strong> questions is applied to<br />

children across <strong>the</strong> age spectrum. The choice<br />

<strong>of</strong> questions must be tailored to a child’s age in<br />

order to reflect <strong>the</strong> developmental stages and<br />

evolving capacities <strong>of</strong> children. 127 Some domains,<br />

such as self-care (e.g., washing and dressing),<br />

will not be appropriate for very young children.<br />

Given <strong>the</strong> complexity <strong>of</strong> developmental processes<br />

that take place over <strong>the</strong> first two years <strong>of</strong> life,<br />

it can be difficult to distinguish disability from<br />

variations in normal development without specialized<br />

tools or assessment. 128<br />

Questions designed to assess disability in <strong>the</strong><br />

adult population are not always applicable to<br />

children, yet many survey instruments use a<br />

FOUR CASE STUDIES (Continued)<br />

uCambodia<br />

3 questions asked:<br />

Does (name) have<br />

any disability?<br />

If yes, what type?<br />

What was <strong>the</strong><br />

cause?<br />

2 questions asked:<br />

Is <strong>the</strong>re a person<br />

who usually lives in<br />

your household<br />

who has any type<br />

<strong>of</strong> physical<br />

impairment?<br />

2 questions asked:<br />

Does (name) have<br />

any disability?<br />

What was <strong>the</strong><br />

cause?<br />

One question asked:<br />

If <strong>the</strong> person is<br />

physically/mentally<br />

disabled, give<br />

appropriate code<br />

from <strong>the</strong> list<br />

1: in seeing;<br />

2: in speech;<br />

3: in hearing;<br />

4: in movement;<br />

5: mental<br />

One question asked:<br />

Does (name) have<br />

any <strong>of</strong> <strong>the</strong> following:<br />

Difficulty seeing,<br />

difficulty hearing,<br />

difficulty speaking,<br />

difficulty moving,<br />

difficulties in feeling<br />

or sensing,<br />

psychological or<br />

behavioural<br />

difficulties, learning<br />

difficulties, fits, o<strong>the</strong>r<br />

(specify)?<br />

Impaired since<br />

birth or due to an<br />

accident?<br />

2%<br />

2%<br />

4%<br />

1%<br />

5%<br />

Socio-Economic<br />

Survey 1999<br />

Demographic and<br />

Health Survey 2000<br />

Socio-Economic<br />

Survey 2003–2004<br />

Census<br />

2008<br />

Socio-Economic<br />

Survey 2010<br />

66<br />

THE STATE OF THE WORLD’S CHILDREN <strong>2013</strong>: <strong>Children</strong> with Disabilities

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