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en:create:functions:valuesd [24.01.2015 16:28] – [Examples] alexander.ritter | en:create:functions:valuesd [24.01.2015 17:13] – [valueSD()] alexander.ritter |
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* //variables// -- A list (array) of variable IDs as stated in the **Variables Overview** | * //variables// -- A list (array) of variable IDs as stated in the **Variables Overview** |
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**Note:** This works in the same way as ''[[:de:create:functions:valuesum|valueSum()]]'' -- the parameters are described in detail in this chapter with various examples. | **Note:** This works in the same way as ''[[:de:create:functions:valuesum|valueSum()]]'' -- the parameters are described in this chapter in detail with various examples. |
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===== Examples ===== | ===== Examples ===== |
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The following PHP code identifies participants who always selected the same value (straight-lining) in the scale "AB01". It sends then immediately to the end of the questionnaire. | The following PHP code identifies participants who always selected the same value (straight-lining) in the scale "AB01", and sends them to the end of the questionnaire immediately. |
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</code> | </code> |
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**Note:** Standard deviation of a scale is not a valid indication of data quality in a questionnaire. ((Leiner, Dominik J. (2014). Too Fast, Too Straight, Too Weird. Post Hoc Identification of Meaningless Data in Internet Surveys. Available on https://www.researchgate.net/publication/258997762)). Only use the examples above with utmost caution. | **Note:** The standard deviation of a scale is not a valid indication of data quality in a questionnaire. ((Leiner, Dominik J. (2014). Too Fast, Too Straight, Too Weird. Post Hoc Identification of Meaningless Data in Internet Surveys. Available on https://www.researchgate.net/publication/258997762)). Only use the above examples with the utmost caution. |
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