I have been for quite some years a guinea-pig in the English National Survey of Ageing (ELSA).
Every couple of years or so they invite you to have an interview, by someone who visits you at home and asks lots of questions about lots of things about daily life – how well you manage, use of transport, a memory-test, and the rest.
Now and then it adds an extra. Once, a short, simple medical. On another occasion, using a form you completed yourself and put in an envelope you then sealed, a survey of the sex-lives of the over-60s! Most recently an activity-monitor survey using one of those sensors you wear like a watch.
Fine so far.
Latest extra one (and they are all voluntary, you can decline), a survey called the ELSA 50+ Memory & Thinking Study. Again by home visit, and I am awaiting the cal to arrange an appointment.
Fine so far…..
….. now the awkward bit.
Or more accurately, a well-meant idea but not exactly workable and statistically weak.
For it asks if you can nominate a relative or friend they can also interview, asking about your own daily life and what if any change he or she has noticed in you over the last ten years!
I thought hard and realised the only one who might is my sister, who lives not far way. She does not want to take part but anyway pointed out very reasonably that she would not know my daily life in any useful detail, still less be able to remember my cognitive abilities from a decade ago!
Friends? I have many – but all members of my model-engineering and other clubs. I see some at best weekly, most only irregularly and a goodly number only a couple of times a year – and they'd be even less knowledgable. They know me really only as a fellow club member.
I suppose this aspect of the survey will work if the friend or relative is very close, maybe living in the same house. Otherwise, one has to wonder if the designers really thought it through!
![guinea pig.jpg guinea pig.jpg](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)