1. You have been provided with a questionnaire used in the 2016-2017 Nigeria vaccination coverage survey. If you were to use this questionnaire as a model for one that you are developing for your own survey, what factors would you consider when reviewing and customizing the questionnaire to ensure that it is aligned to objectives relevant in your own country context? (If your country context is Nigeria, consider objectives that could be considered for future surveys.)

Separate questionnaires should be developed for each population group under investigation -- eg, children 12-23m (RI), children 24-35m (RI), women 15-44y (RI), children 0-59m (polio NIDs), children 9m-14y (measles SIAs), etc. -- in accordance with survey objectives.

Questions related to HH status and HH members' characteristics should be developed in accordance with social, cultural and economic conditions in the country.

2. From the Nigeria questionnaire provided, develop a sample code book (data dictionary) ONLY for section 1: household information of the questionnaire. (You can attach an Excel or Word file in your Update and/or insert a screenshot of your file.)

Please see attached spreadsheet.

Survey_20codebook_2C_20section_201_2C_20Nigeria.xlsx

Survey codebook, section 1, Nigeria

3. Why is it important to have a unique identifier for each individual in a survey? Summarize key considerations for the design of a numbering system to ensure this.

Without a unique ID, it is difficult or impossible to link different datasets or different parts of the same dataset to a single individual, such as interview data, HBR photos, GPS coordinates for HH, and more. Unique IDs facilitate compilation and analysis for each individual. Unique IDs are comprised of cluster number + HH number + individual number.

4. If paper data collection and pictures are to be taken, how will you ensure that the pictures can be linked to the correct child?

The unique ID assigned to the child should be used to label the photos -- example below. The interviewer should make a note on paper as he/she takes each photo so that the photos can be labeled correctly when they are downloaded at the end of the day's work.

Child ID -- xxx-yyy-zzzz

Photo 1 -- xxx-yyy-zzzz-p1

Photo 2 -- xxx-yyy-zzzz-p2

5. Data collection is increasingly being conducted using CAPI (computer assisted personal interviewing) with tools like CSPro, ODK, etc. What features would you recommend are added to the data collection software to improve overall data quality? What considerations for support and in case of malfunctions would you put in place (contingency planning, support and troubleshooting, etc.)?

A software application is required to design the questionnaire templates for field data collection in electronic devices. When programming field data collection devices, safeguards can be built in to discard obvious mistakes, like out-of-range dates of birth. Using devices for direct data entry allows the interviewer to check the entries for mistakes and correct them before the data are transmitted. Direct data entry eliminates the issue of bad handwriting. Using a smartphone allows access to the GPS coordinates of the house, which will help identify if a household is within the right geographical boundaries. In some cases, it will help the supervisor to identify a house that has to be re-checked. A smartphone can also document the time of entry and exit of each house. The supervisor should review the records each day, before or after data transmission through mobile devices. The data entered during the day can be sent back to the field every evening for corrections.

A plan for safe and regular data back-up should be developed in advance and supervisors should ensure that this is done by competent survey team members in accordance with technical instructions and a schedule agreed with the Data Manager. Arrangements for daily battery recharging of field data collection devices should be planned in advance. In locations where electrical supply is unreliable, it may be useful to ensure access to a back-up generator. Contingency planning to deal with lost, damaged or out-of-service devices should also be put in place.