Improving Gerontological Survey Participation With Mixed-Mode Response Options, Multiple Contacts, and Noncontingent Incentives.

Response rate was 34.1% with more surveys returned via mail than online. Participants who received a gift card responded at a higher rate (46.33%) than those who received continuing education coupons (28.0%). The results add to the literature of survey methodology to improve response rates among social workers and support noncontingent gift cards and mixed-mode survey return procedures as best practices for reducing bias and improving the quality of gerontological research.