Interviewers must be instructed to read back an e-mail address, character by character. Send personalized e-mails within 24 hours to each recruited respondent. Otherwise people can quickly forget what they've promised to do. Create a unique password allowing each respondent access to the web site. The Sawtooth CVA Internet module allows for the creation passwords.
Respondents use the password to begin the survey.
If necessary, a respondent can leave the survey and use the password to resume the survey at a later time. However, once a respondent had completed the survey, the password is rendered inoperable, preventing repeated access to the survey site. Each e-mail message should contain a hyper link to the survey web site and the respondent's unique password. Each morning, simply load the results of the previous evening's recruiting into a spreadsheet, add a password to each record, and MailKing does the rest. Offer a generous incentive.