RLI 288  12 RESEARCH LIBRARY ISSUES: A REPORT FROM ARL, CNI, AND SPARC 2016 FIGURE 3. SURVEY INTERCEPT PROCESS FOR EVERY NTH SAMPLING METHOD USED IN 2013–2014 In this survey an abandonment reduction factor was included, making the survey more valid. Once the patron browser request was intercepted and the survey launched, the patron had five minutes to complete the survey. If the patron did not complete the survey in that time, then the survey timed out. A multi-step intercept calculation accounted for expired surveys and maintained the desired 140th user rate of return. The median time to complete the survey was 45 seconds (five minutes was the maximum allowed) the fastest survey was completed in 12 seconds. Figure 4 shows the survey completion time distribution in seconds. The overall response rate was 71%. FIGURE 4. SURVEY COMPLETION TIMES, WHEN USING EVERY NTH SAMPLING METHOD IN 2013–2014
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