Procedural experiments These experiments explore survey design procedures which are intended to reduce non-response or to improve fieldwork efficiency. NumberExperiment Wave(s) appeared7.1Respondent incentives to encourage participation and web responseAll7.2Conditional and unconditional incentives77.3Mixed mode experiments: telephone and face-to-face37.4Mixed mode experiments: web and face-to-face5-11, 15-167.5Paper vs CASI self-completion4, 5, 67.6Advance materials: letters vs. cards27.7Advance materials: content of advance letters57.8Targeted advance letters67.9Number of mailings between interviews77.10Different ways of asking respondents to register on participant website47.11Improving interviewer observations about characteristics of address47.12Effect of content of re-issue letter on refusal conversion47.13Early bird scheduling: encouraging respondents to call interviewer to schedule appointment47.14Targeted weekday invitation emails97.15Using prospect theory In wording of advance letters107.16Invitation letters for mixed mode survey117.17Spending Study 2117.18Invitation to complete pre-interview blood pressure measure:information treatment vs pro-social appeal127.19Fieldwork compression experiment137.20Event triggered data collection137.21Consent to send survey questions by SMS13,157.22Wellbeing app study137.23Asking for Living Apart Together partner details147.24Contact protocols for IP14 refreshment sample147.25PERKs for unconditional incentives167.26Youth online survey167.27Test of Government logo on envelopes for continuing sample167.28Youth survey invite mailing17
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