Interviewer instructions
Some household heads have difficulty remembering the ages of all memebers of the household.--in some cases even their ages.Allow the respondent to consult with other members of the household or suggest for young children that they may look at their clinic cards. Almost all persons who have been to school will know their age, while some, especially the illiterate and the old will not. Ask such a person how long he has been living in the area about what time in his life he came here, what he did then and for how long and how old he was when he left his parent's home. In this manner, you can build a life history.
It may be possible to determine age by referring to some historical events that the respondent may remember. E.G. you could ask how old the respondent was when Gambia became a republic.