How to provide return link in jsPsych for participants recruited through prolific?

Online experiments jsPsych
1

I have not found any documentation on how to provide a completion return link to Prolific using jsPsych and the Pavlovia plugin. My issue is that I don’t know what does the Pavlovia script do at the end of a jsPsych experiment. Is it okay to redirect inside the on_finish function?

...
let pavlovia_finish = {
        type: "pavlovia",
        command: "finish"
    };
    timeline.push(pavlovia_finish);

jsPsych.init({
        timeline: timeline,
        on_finish: function () {
            location.href="returnlink.html" // Real link would go here
        }
    })
2

bump

3

@apitiot is there a way to provide completion URL to the jsPsych plugin?

4

Update: Someone suggested to me to simply add a new trial with the return link after the pavlovia_finish trial, is this alright? Or will it cause any problems with Pavlovia?

5

No, the concern is that the data get saved after the trials finish and the forwarding URL needs to come after that. If you forward out of the experiment in a trial then the trials haven’t ended and the data will not be saved (is my guess)

6

That was/is my concert as well, although I did not test it. Instead I decided to forward participants to the url after the end of the experiment, following a 10sec timeout. It worked, but it feels hackish…

jsPsych.init({
            timeline: timeline,
            on_finish: function () {                
                document.body.innerHTML = '<p> Please wait. You will be redirected back to Prolific in a few moments.</p>'
                setTimeout(function () { location.href = "https://app.prolific.co/submissions/complete?cc=XXXXXX" }, 10000)
            }
        })
2 Likes
7

I am having a similar problem (although with jsPsych and our participant-recruiting system SONA). Is there an official solution yet?