The Large Scale Feasibility Test (LSF) was proposed in the Gemini Redesign Project as the final field test of the online diary instrument prior to implementation. The field test would build on information learned from prior tests and have sufficient sample to make statistical inferences.
The main objectives were to:
The results of the LSF will be used to inform the design and implementation of online diaries in the CE Diary Survey in 2022.
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|Full Design Overview|
This page provides a brief overview of the LSF design and related material. For a detailed overview of the design, click on the above PDF link for the LSF Detailed Overview.
The test involved a small pilot test conducted in July 2019, followed by a six-month field test starting in October 2019 with a starting sample of 2,500 cases. Interviewers made two visits to households, one to place the diaries and the other to pick up the diaries. An experiment on the use of incentives and pre-notification postcards was part of the test. Respondents were provided a two week online diary if they qualified based on responses to screening questions. If they were ineligible or refused the online diary, they were placed with paper diaries. Interviewer debriefing was conducted after data collection to get feedback on procedures, instruments, and materials. Respondent feedback on the online diary procedures, instrument, materials, and overall experience was obtained through a self-administered respondent debriefing.
The LSF included an incentive and pre-notification postcard experiment. The selected initial sample was divided into two randomly assigned incentive groups and three pre-notification postcard groups.
The remaining non-incentive group (Group 2) was divided into two randomly assigned subgroups for the postcard experiment:
Advance letters describing the interview were sent via Priority Mail, about one week prior to each month of interviews. Prenotification postcards were sent by first class mail prior to the advance letter. The postcards and advance letters sent to the incentive group referenced the incentive.
Standard CE Diary Survey with paper diaries.
The results of the LSF are outlined in a preliminary report (which uses unprocessed test data) and a final report (which used the processed data). The online diary was provided as an alternate mode in the CE Diary Survey during the Covid-19 pandemic and will officially be implemented into production in July 2022.
Last Modified Date: February 17, 2022