The Method
The survey followed a modified Dillman method utilizing both mail and web methodologies.
Sampled AARP members with a registered email address on file with AARP were initially contacted via email.
This email invitation provided members with a personalized URL to the online version of the questionnaire.
All other members received exclusively mail contacts beginning with a prenotification letter explaining the survey.
In total, members could have received up to 3 email contacts and up to 5 mail contacts.
The next to last mail contact included a replacement questionnaire.
Weighting
Weighting of the MOS was carried out in two stages.
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