How can I mark survey responses with skipped questions?

I'm not sure if this exactly matches your requirements, but while downloading the data, there is an option to mark "seen but unanswered" questions with a specific value (defautls to - 99). You could look at that.

Yes. this seems like something that should be available by default. Something that gives us a ratio of answered/seen. You could look at adding this JS to your header and see if it does the job for you. It creates two embedded variables answered and unanswered. The unanswered one will only be populated if they have not answered the question even after the response request. So, at the end of your survey, you could check to see if its empty or not:
Qualtrics.SurveyEngine.addOnReady(function () {
    document.querySelector("#NextButton").onclick = function () {
        let page_ans = [],
            page_uans = [];
        document.querySelectorAll("div[id^=QID][class*=QID]").forEach((question) => {
            let chosen = question.querySelectorAll(".q-checked");
            if (chosen.length == 0) {
                page_uans.push(question.id);
            } else if (chosen.length > 0) {
                page_ans.push(question.id);
            }
        });
        let old_ans = String(Qualtrics.SurveyEngine.getEmbeddedData("answered"))
            .split(",")
            .filter((el, ind, ar) => {
                if (ar.indexOf(el) != ind || el == "null") return false;
                else return el;
            });
        let old_uans = String(Qualtrics.SurveyEngine.getEmbeddedData("unanswered"))
            .split(",")
            .filter((el, ind, ar) => {
                if (ar.indexOf(el) != ind || el == "null") return false;
                else return el;
            });


        page_ans.forEach((item) => old_ans.push(item));
        page_uans.forEach((item) => old_uans.push(item));


        old_uans = old_uans
            .filter((a) => {
                if (old_ans.indexOf(a) > -1) return false;
                else return a;
            })
            .filter((el, ind, ar) => {
                if (ar.indexOf(el) != ind || el == "null") return false;
                else return el;
            });
        old_ans = old_ans.filter((el, ind, ar) => {
            if (ar.indexOf(el) != ind || el == "null") return false;
            else return el;
        });


        Qualtrics.SurveyEngine.setEmbeddedData("unanswered", old_uans.join());
        Qualtrics.SurveyEngine.setEmbeddedData("answered", old_ans.join());
    };
});

Right now it only works with multiple choice and matrix questions, but it can be easily extended to others also.

This line:
let chosen = question.querySelectorAll(".q-checked");
Basically checks if a MC option has been selected and then pushes the question id to the appropriate array. You could add more checks for other question types.

Put it between these two tags in th header:

ahmedA
So it looks like this is in the ballpark, but the script seems to only count the Answered and Unanswered questions out of the entire survey, not just the items each person has seen. This makes trouble because depending on which of 3 groups they belong to, each person only fills out one section of the survey. Currently, it's listing items form the sections they don't see in the Unanswered variable.
If there's a way to limit it to only the items each person has viewed, or better, if there's a way to count how many times people choose the option "Yes, continue without answering," then, problem solved.

ahmedA

1. There is a JS "Withdraw from Survey" button on each page, done using a dummy question and a confirmation question, which are hidden by javascript.


2. Yes, if it works on Qualtrics's platform messages, like the confirmation to continue without answering then I'd be interested. My first thought with this was, if I could just score those conditionally-appearing confirmations to skip items, then bam, problem solved; anyone with a score over X has skipped items. But, I don't think I can do anything of the sort with one of Q's internal questions.


3. I'm interested in anything that provides me a pre-export datapoint that specifically indicates whether or not a user has skipped items without answering.

ahmedA
It's hard to tell because the labels it's using in here are not the labels I gave my items, they are named using block ID. I attached a screenshot of the Answered and Unanswered data output cells for one respondent.
The respondent (me) skips zero questions, yet there are far more items in Unanswered than in Answered. For this survey section, there are 17 pages, each with a Withdraw item hidden by JS and a second "Confirmation to Withdraw" question hidden by a display logic.

So I would have to use this JS in each page of the survey for it to work?