[[Multi-Wave Survey]]
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en:create:waves [29.10.2017 19:31] – claudia.seiferten:create:waves [01.12.2020 22:11] – service
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-If you want to survey one and the same respondent over different periods of time you are usually dealing with a multi-wave survey, a longitudinal study or a diary design which all three face two challenges:+If you want to survey one and the same respondent over different periods of time, you are usually dealing with a multi-wave survey, a longitudinal study or a diary study which all three face two challenges:
  
   * How to ensure that your respondents complete the questionnaire at the right time?   * How to ensure that your respondents complete the questionnaire at the right time?
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 When using multiple questionnaires for every completed questionnaire a new dataset (data row) is stored. For matching reasons every data row needs a distinct participant code. By doing the following one can get such a code: When using multiple questionnaires for every completed questionnaire a new dataset (data row) is stored. For matching reasons every data row needs a distinct participant code. By doing the following one can get such a code:
-  * If you send mailings, SoSci Survey automatically stores a distinct personal identification under the variable SERIAL (additional variable in the data output). This is possible also without losing any anonymity. Important: The email must contain the placeholder %link% in order to actually send personalized links.  +  * If you send mailings, SoSci Survey automatically stores a distinct personal identification under the variable SERIAL (additional variable in the data output). This is possible also without losing any anonymity. 
-  * You can send personalized links on your own. The identification of every participant then will be passed by a reference or a serial number (see also [[en:survey:url|URL to the Questionnaire]]). A reference will be stored under the variable REF, a serial number will be stored in the variable SERIAL (this one also allows for continuing the questionnaire). +    * **Important:** The email must contain the placeholder %link% in order to actually send personalized links. 
 +    * **Important:** All questionnaires must be created within the same survey project. The personal IDs are specific for each project. 
 +  * You can send personalized links yourself. The identification of every participant then will be passed by a reference or a serial number (see also [[en:survey:url]]). A reference will be stored under the variable REF, a serial number will be stored in the variable SERIAL (this one also allows for continuing the questionnaire). 
   * The participants are asked to create a personal code and enter this to a text gadget (for example with the first letter of their mother's name, the last digit of their birth year and so on). Because of its susceptibility to errors we do not recommend this option. If you want to use such an option it is important to ask the single components of the code in distinct, single text gadgets.   * The participants are asked to create a personal code and enter this to a text gadget (for example with the first letter of their mother's name, the last digit of their birth year and so on). Because of its susceptibility to errors we do not recommend this option. If you want to use such an option it is important to ask the single components of the code in distinct, single text gadgets.
  
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   * Follow up Questionnaire   * Follow up Questionnaire
  
-If email addresses are unknown you might need a forth questionnaire registration of the participants ([[en:survey:opt-in-live|]]).+If email addresses are unknown you might need a fourth questionnaire for registration of the participants ([[en:survey:opt-in-live|]]).
  
 A mailing is created for every email or reminder that a participant shall receive. For example, two mailings for the previous questionnaire (invitation and reminder) and one per day. In the list of mailings is a button which easily and fast creates copies of mailings (button: duplicate).  A mailing is created for every email or reminder that a participant shall receive. For example, two mailings for the previous questionnaire (invitation and reminder) and one per day. In the list of mailings is a button which easily and fast creates copies of mailings (button: duplicate). 
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 **Tip**: To which addresses an email will be send, will identified right at time of sending - in case it is a standardized interval for all addresses. Consequently, addresses can be added even after determining the time and date of sending.  **Tip**: To which addresses an email will be send, will identified right at time of sending - in case it is a standardized interval for all addresses. Consequently, addresses can be added even after determining the time and date of sending. 
  
-**Important**: Please choose the questionnaire to which a mail shall refer to only in the tab "link to questionnaire", if you are using placeholders like %link% and %link.html% in the invitation. The placeholder ensures that data rows will contain personal identifications in the variable SERIAL. +**Important**: Please choose the questionnaire to which a mail shall refer to only in the tab "link to questionnaire", if you are using placeholders like ''%link%'' and ''%link.html%'' in the invitation. The placeholder ensures that data rows will contain personal identifications in the variable SERIAL. 
  
 ==== Mobile Experience Sampling Method (MESM) ==== ==== Mobile Experience Sampling Method (MESM) ====
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   * The address list takes email-addresses as well as phone-numbers (instead or additionally).   * The address list takes email-addresses as well as phone-numbers (instead or additionally).
   * The Opt-In-question takes email addresses as well as mobile-phone-numbers. For a validation of a number an additional email address is necessary.   * The Opt-In-question takes email addresses as well as mobile-phone-numbers. For a validation of a number an additional email address is necessary.
-  * Important: +  * Important: providers of mobile phone network charge a fee for sending SMS (per SMS costs incur by 0.10 Euros (plus sales taxes).  
 +  * SoSci Survey supports the sending of mailings (or SMS) at random intervals. At "Preparing Sending" you can choose the option "time-randomized sending" and subsequently determine the interval.  
 +  * **Important:** For every invitation a participant shall receive, a new distinct mailing must be created. For example, if during the period of 7 days 3 SMS per day shall be sent, you have to create 21 mailings (you can easily duplicate an email). For the first email you could then for example choose and random point of time on monday between 8 and 11 o'clock, for the second a random point of time between 11 and 2 o'clock and so on. 
 +  * **Important:** Time-randomized sending assigns a specific point of time to every participant. When subsequently adding addresses those participants will not receive an invitation, because for them no point of time was determined.  
 +  * Questionnaires that were created using SoSci Survey can usually be completed via smartphone, but for a MESM-study it is worth the effort to optimize the questionnaire for smartphones, among others with an optimized layout. 
 +       
                
-        Wichtig: Die Betreiber von Mobiltelefon-Netzen verlangen ein Entgelt für den Versand von SMS, pro SMS fallen Kosten in Höhe von ca. 0,10 € (zzgl. USt.) an. 
-    SoSci Survey unterstützt den Versand von Serienmails (oder eben SMS) zu zufälligen Zeitpunkten. 
-        Beim Versand einer Serienmail (Serienmails verschicken) kann man dafür bei Zeitpunkt für den Versand die Option „Zeit-randomisierter Versand“ auswählen und anschließend den Zeitraum definieren. 
-        Wichtig: Pro Einladung, die der Teinehmer erhalten soll, muss eine eigene Serienmail angelegt werden. Sollen also z.B. über 7 Tage jeweils 3 SMS pro Tag verschickt werden, müssten 21 Serienmails angelegt werden (man kann Serienmails einfach duplizieren). Für die erste Serienmail würde dann z.B. ein zufälliger Versand am Montag zwischen 8 und 11 Uhr eingeplant, für die zweite Serienmail ein zufälliger Versand am Montag zwischen 11 und 14 Uhr u.s.w. 
-        Wichtig: Der Zeit-randomisierte Versand weist jedem Teilnehmer einen bestimmten Zeitpunkt zu. Wenn später noch Adressen in die Adressliste aufgenommen werden, so erhalten diese keine Serienmail, da für sie kein Versandzeitpunkt festgelegt wurde. 
-    Fragebögen, die mittels SoSci Survey erstellt wurden, können zwar in aller Regel auch auf dem Smartphone ausgefüllt werden – aber für eine MESM-Studie lohnt es sich, den Fragebogen speziell für das Smartphone zu optimieren (Fragebögen für Smartphones), u.a. mit dem entsprechenden Fragebogen-Layout 
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-Angemeldet als: Claudia Seifert (claudia.seifert) 
-de/create/waves.txt · Zuletzt geändert: 14.02.2017 18:03 von fahr  
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