[[Prevent Multiple Submissions by the Same Respondent]]
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en:survey:unique-respondents [10.07.2018 21:22]
admin [Data clearing] 		en:survey:unique-respondents [10.07.2018 21:22] (current)
admin [Data clearing]
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 If multiple entries are expected in competitions data cleansing might help. It is very unlikely that a participant will fill out the same questionnaire several times with the same motivation. It is much more likely that they complete the questionnaire as quickly as possible. If multiple entries are expected in competitions data cleansing might help. It is very unlikely that a participant will fill out the same questionnaire several times with the same motivation. It is much more likely that they complete the questionnaire as quickly as possible.
  
-If one excludes "rusher" in the course of data cleansing one should already have identified most multiple participants. This could e.g., be done by identifying questionnaires that were answered extraordinarily quickly, as well as cases with more than 20% missing answers (variable [[:en:results:variables#interview-progress|MISSREL]]). See [[https://www.researchgate.net/publication/258997762|Leiner (2014)]] for more information on data cleansing.+If one excludes "rusher" in the course of data cleansing one should already have identified most multiple participants. This could e.g., be done by identifying questionnaires that were answered extraordinarily quickly, as well as cases with more than 20% missing answers (variable [[:en:results:variables#interview_progress|MISSREL]]). See [[https://www.researchgate.net/publication/258997762|Leiner (2014)]] for more information on data cleansing.
  
 If you collect the contact data for the competition separately from the other data ([[:de:create:questions:contact|Collect Contact Data Separately]]) you have to make sure that fast participants cannot register by using the PHP function ''[[:en:create:functions:casetime]]''. If you collect the contact data for the competition separately from the other data ([[:de:create:questions:contact|Collect Contact Data Separately]]) you have to make sure that fast participants cannot register by using the PHP function ''[[:en:create:functions:casetime]]''.
en/survey/unique-respondents.txt · Last modified: 10.07.2018 21:22 by admin
 
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