Randomize the order of buttons in html-button-response

[synapticlee]

Hi, I'm using jspsych-6.3.1. I was wondering in html-button-response how one would randomize the order of buttons on a trial-by-trial basis (so the same 'answer' isn't always on the left). I used a javascript shuffle function to literally shuffle the list, but the issue is that 'response' is only mapped to the order of the buttons, and therefore I don't actually know which 'answer' was picked. Is there a way within jspsych to randomize the order of buttons while still knowing which button was picked?

(At the moment, I'm using html to make the button images, but that's incidental to this question)

[jodeleeuw]

Hi @synapticlee ,

You can use the save_trial_parameters parameter to record the randomized order of the buttons, and then map the response to button after the fact. The example in the documentation shows a very similar scenario.

[synapticlee]

Oh great, thank you! This works! I think actually because I was shuffling at the timeline block level rather than at the trial level, once I did this, it worked

choices: function() { return jsPsych.randomization.shuffle(jsPsych.timelineVariable('choices')); },