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Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision | ||
en:survey:opt-in-live [25.06.2015 10:40] – [Preparation] alexander.ritter | en:survey:opt-in-live [15.07.2015 21:19] – admin | ||
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- | ====== Multi-Wave Surveys with Self-Selection | + | ====== Multi-Wave Surveys with Self-Recruited Respondents |
As a general rule, participants' | As a general rule, participants' | ||
Line 71: | Line 71: | ||
<code php> | <code php> | ||
- | // time which the page interruption was first accessed in stored in the $timepart1 variable. | + | // Time which the page interruption was first accessed in stored in the $timepart1 variable. |
// isset() und registerVariable() prevent this time being changed when the page is accessed again (e.g. if the page is refreshed) and/or emails being duplicated. | // isset() und registerVariable() prevent this time being changed when the page is accessed again (e.g. if the page is refreshed) and/or emails being duplicated. | ||
if (!isset($timepart1)) { | if (!isset($timepart1)) { |