Running a jsPsych experiment on Tavra

How it fits together

Tavra opens your experiment's link with the worker's assignment reference added as a URL parameter. Your code reads it, stores it with the data and, when the timeline finishes, sends the browser to the return link from Tavra's template.

Set up your experiment

• Save data to your own server before redirecting; jsPsych's local save is meant for testing, not online collection.
• Keep the reference with every row so you can match data to approvals.

const params = new URLSearchParams(window.location.search);
const reference = params.get("REFERENCE_PARAMETER_FROM_TEMPLATE");

const jsPsych = initJsPsych({
  on_finish: async () => {
    await saveToYourServer(jsPsych.data.get().json(), reference);
    window.location.href = RETURN_LINK_FROM_TEMPLATE + encodeURIComponent(reference);
  },
});
jsPsych.data.addProperties({ tavra_reference: reference });