How to give a "Don't Know" option?

Question

I have a text entry question but want to give the respondents the option to select "Don't Know" instead of filling it out. I don't see a way to do this in the question options at all - any suggestions?

AnthonyR · Accepted Answer

The best way to set this up is to create a multiple choice question with 2 answers, the first will include a text entry, and the second will be Don't know. Then you can add the following JavaScript to hide the first label, while keeping its text entry box:                Qualtrics.SurveyEngine.addOnReady(function () {        function hideLabel(element) {        if (element.select('input')[0] != null || element.select('textarea')[0] != null) {        element.select('label').each(function (a, b) {        a.hide();        });        } else {        console.log(element);        }        }        var hideLabelsFlag = false                function hideLabels() { //QH.hideLabels() - Hides the label for any answer option where a text input has been added.        var elements = $$('.LabelWrapper');        elements.each(function (name, index) {        hideLabel(name);        });        hideLabelsFlag = true;        }        hideLabels();        });

JulieT · Answer

Stop! Don't do it Poppy! Qualtrics advises against including a "Don't Know" option and has a great article as reference. https://qualtrics.com/blog/why-including-dont-know-responses-is-hurting-your-survey-data/

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