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en:survey:opt-in-live [25.06.2015 10:40] – [Preparation] alexander.ritteren: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' email addresses have to be known beforehand when carrying out a multi-wave survey as the respondents have to be invited, at some point, to a survey wave at a later date. However, if participants have been recruited via links on a website, social media or advertising banners, then their email addresses are not known beforehand. This chapter explains different technical solutions that guarantee the respondents' anonymity.  As a general rule, participants' email addresses have to be known beforehand when carrying out a multi-wave survey as the respondents have to be invited, at some point, to a survey wave at a later date. However, if participants have been recruited via links on a website, social media or advertising banners, then their email addresses are not known beforehand. This chapter explains different technical solutions that guarantee the respondents' anonymity. 
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 <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)) {
en/survey/opt-in-live.txt · Last modified: 07.09.2022 20:57 by admin
 
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