>I'm sure her intent was to get as many people as possible responding as that gives more solid results.
That was my point though - it doesn't matter whether 1 or a million people respond, the results can never be valid. There is no correlation between my pain problems & computer use. Similarly, other external influences are affecting my currently limited social life. Without asking more questions about the reasons for things, the results of the survey are completely groundless.
Len Speed