Question on Vision

1. Question on Vision Country pre-test results: Vietnam By Nguyen Phong Nguyen Dinh Chung General Statistics Office 6th Annual Meeting of the Washington Group in Kampala, Uganda 9/06/06

2. Cognitive Pre-test Implementation • 134 PWD were selected from Ha Noi and Thai Binh province, 51.5% female • 87 from Hanoi’ PWD Associations (Deaf-and-Dump Xa Dan School, Ha Noi Deaf Association, Bright Future Group, Hanoi Disable Student Club Of Management College, Ha Noi Disable Club Of Students, Hold The Future Group, Hope Club, Integration Club, The Center For Art Vocational Guidance, You & I Group) • 47 from Thai Binh province, from a list of PWD in two communes, one from urban and the other from rural area. • The respondents were selected purposively for specific characteristics such as their gender, type of disability, various age groups

3. Cognitive Pre-test Response Patterns

4. The Index of Inconsistency • IOIestimates the ratio of response variance to total variance for a question answer. It is a relative measure of response variance. • If the estimate of IOI is: • less than 20, response variance is low. • between 20 and 50, response variance is moderate. • greater than 50, response variance is high.

5. IOI for Cognitive Pre-test Vision Aggregate IOI: W4 (39.5%), W1 (43.0), W2 (45.4%), W5 (51.3%), W6 (54.7%), W3 (68.6%).

6. Cognitive Pre-test Findings • A&B: agreements between core and extended questions • “Proxy” might not be sure as “Self” • C&D: agreements between core and extended questions

7. Cognitive Pre-test Findings • E&F: disagreements between core and extended questions • Interviewer and/or respondent missed “even if wearing glasses” in W1 • Aging respondents believe their vision ability is weakenning • Respondents don’t have glasses at all, so they answered “YES” to W1, but when they have been asked extended questions they might borrow glasses and wear them and then their problem disappeared.

8. Cognitive Pre-test Findings • G&H: disagreements between core and extended questions • Being asked W1 respondents believe their vision ability is OK in general, but when they have been asked extended questions they realized they have problems. • Interviewers might not show the answer-code card to respondents when they asked W1, so respondents might answer “YES” to W1 if they have serious difficulty only, ignoring "some difficulties” option.

9. Following-up Activity 1:Pilot Test on Disability • Pilot Test in Thai Binh: 29 questions (6 core questions, 22 extended questions, 1 question for the disability cause) • Sample: 1020 households of Viet Nam Household Living Standards Survey 2004 • All household members aged 5+ were interviewed: 3,409 persons • 6 core WG questions and a short list of extended questions were used

10. Pilot Test on Disability: Six domains • Vision • Hearing • Mobility • Cognition • Self care • Communication

11. Pilot Test on Disability: Answer code • No difficulty • Some difficulties • A lot of difficulties • Unable

12. Pilot Test on Disability: Cause • Age (too old or too young) • War • Agent Orange • Natural disasters • Traffic accidents • Occupational accidents • Congenital condition • Drug addict/HIV/AIDS • Social evils • Illness/disease • Education limitation • Because of other disability • Other

13. Pilot Test on Disability: Vision Results

14. Following up Activity 2:Disability Module in VHLSS2006 • Questions from “Pilot Test on Disability” except those marked “***” were intergrated in Viet Nam Household Living Standards Survey 2006 • Sample size: 46,000 households • All household members aged 5+ were interviewed • Disability vs. living standards and poverty

15. Thank you !