Has anyone done a longitudinal study before? What was your incentive model like?
We're asking participants to commit to 8 sessions, happening roughly two weeks apart. We are fully prepared for drop-outs but want to minimize this, obviously. We'd considered giving people some money for each session (say $50), and then reserving the same amount of money for the very end, which would be handed over if they complete all 8 sessions. So they'd get $50 every session for 8 sessions, and get an extra $400 at the end if they attended all 8. If they miss one of the 8, the bonus money wouldn't be paid out. The trouble is, if someone misses session 5, we are worried that such a model might make them give up on sessions 6, 7 and 8. If they've already blown the big pay-out at the end, why bother continuing? Any suggestions on how we can use incentives to encourage long-term participation? Thanks, Meredith - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Meredith Noble Information Architect, Usability Matters Inc. 416.598.7770 x16 [EMAIL PROTECTED] http://www.usabilitymatters.com <http://www.usabilitymatters.com> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ________________________________________________________________ Welcome to the Interaction Design Association (IxDA)! To post to this list ....... [EMAIL PROTECTED] Unsubscribe ................ http://www.ixda.org/unsubscribe List Guidelines ............ http://www.ixda.org/guidelines List Help .................. http://www.ixda.org/help
