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en:create:random_questionnaire [29.07.2019 19:21] – Complete Update admin | en:create:random_questionnaire [25.03.2021 20:35] – [Random Selection for Questionnaires] sophia.schauer |
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====== Random Selection for Fuestionnaires ====== | ====== Random Selection for Questionnaires ====== |
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In a survey project you can create several questionnaires (**Assemble Questionnaire**) -> **Create new Questionnaire** or **Manage Questionnaires**). If the participant opens the [[:en:survey:url|link to to questionnaire]], they can be randomly assigned to one of the questionnaires. | In a survey project you can create several questionnaires (**Assemble Questionnaire**) -> **Create new Questionnaire** or **Manage Questionnaires**). If the participant opens the [[:en:survey:url|link to to questionnaire]], they can be randomly assigned to one of the questionnaires. |
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| **Warning:** If you implement randomization across different questionnaires, systematic dropouts can lead to an (sometimes significantly) uneven distribution in the completed questionnaires. Use only a questionnaire with [[:en:create:randomization]] of the stimulus to reliably fill the experimental groups evenly (see also the following note). |
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| **Warning:** If the experimental groups work in different questionnaires, it is necessary to pay special attention to ensure that the questionnaires are identical except for the treatment. For example, if a change is made in only one of the questionnaires after the pretest, this can lead to confounding and the inability to use the data. The "normal" [[:en:create:randomization]] is less error-prone here. |
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**Note:** For experiments it is usually much easier (!) to create only one questionnaire and vary the stimulus with a small PHP code ([[:en:create:randomization]]). | **Note:** For experiments it is usually much easier (!) to create only one questionnaire and vary the stimulus with a small PHP code ([[:en:create:randomization]]). |
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==== How-to ==== | ===== How-to ===== |
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First you create an additional questionnaire under **Assemble Questionnaire** -> **Create new Questionnaire**, that takes care of the random assignment. The questionnaire identifier can be chosen freely, for the following description we use the ID "random". | First you create an additional questionnaire under **Assemble Questionnaire** -> **Create new Questionnaire**, that takes care of the random assignment. The questionnaire identifier can be chosen freely, for the following description we use the ID "random". |
{{:de:create:scr.random-questionnaire.random-create.png|Create random generator}} | {{:de:create:scr.random-questionnaire.random-create.png|Create random generator}} |
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Enter the IDs of the questionnaires (see above) you want to choose between as //codes// in the random generator and save the question ({:button.save.png|Save question}}). | Enter the IDs of the questionnaires (see above) you want to choose between as //codes// in the random generator and save the question ({{:button.save.png|Save question}}). |
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Leave the default setting "equally distributes" selected for the //type of drawing//. The option "Equally distributed in finished questionnaires" will //not// work because the random distribution questionnaire will never be finished. | Leave the default setting "equally distributes" selected for the //type of drawing//. The option "Equally distributed in finished questionnaires" will //not// work because the random distribution questionnaire will never be finished. |
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{{:de:create:scr.random-questionnaire.questionnaire.png|Questionnaire to randomly select a questionnaire}} | {{:de:create:scr.random-questionnaire.questionnaire.png|Questionnaire to randomly select a questionnaire}} |
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| You have chosen the questionnaire "random" under **Assemble Questionnaire** -> **Administer Questionnaires** as the default questionnaire for the survey project. The participants can call [[:en:survey:url]] without further parameters (''q=...''). They will then first be taken to the "random" questionnaire and from there randomly distributed to one of the other two questionnaires. |