Nested Loops

[arshiya01]

Hello,

I want to write a code that displays a video followed by survey-multi-select and based on the number of options selected, I want to display the video again that many times with varying prompts slider. I want to repeat this for every video in my stimulus dataset. (It sounds like a nested loop)

Here is the code I have so far

const jsPsych = initJsPsych();
    // Define the global variable to store the prompt
    var resp = [];

    stim = ['vid1', 'vid2', 'vid3', 'vid4', 'vid5'];

    dispTrial = [];
    for (var i=0; i<stim.length; i++){
        dispTrial.push({
            type: jsPsychHtmlKeyboardResponse,
            stimulus: 'displaying vid'
        })
    };

    var resp = [];
    
    function saveResponses(response) {
    // Set the global resp variable using the response from the
    // jspsych-survey-multi-select plugin
        for(var i = 0; i<response.length; i++){
            resp.push(response[i]);
        }
    }

    // Define the trial that contains the jspsych-survey-multi-select plugin
    var multiSelectTrial = {
        type: jsPsychSurveyMultiSelect,
        questions: [
            {prompt: 'Select one or more options:', options: ['Option 1', 'Option 2', 'Option 3']}
        ],
        on_finish: function(data) {
            // Call the function using the response from the
            // jspsych-survey-multi-select plugin
            saveResponses(data.response.Q0);
        }
    };

I am not able to figure out how to display the video based on the number of options user selected, and how to repeat it for every video.

I also tried the following code, but this doesn't seem to work too.

 trials = [];
    for(var i =0; i<stim.length; i++){
        trials.push({
          type: jsPsychVideoSliderResponse,
          stimulus: function(){
            for(var j=0; i<resp.length; j++){
              return [stim[j]]
            }
            },
          prompt: function(){
            for(var k=0; i<resp.length; k++){
              console.log(resp[k])
              return'<p>How ' +resp[k]+ ' do you feel?</p>'
            }
            },
          autoplay: false,
          controls: true,
          labels: ['Not at all', 'Extremely'],
          require_movement: true,
          button_label: "Continue",
        });
    };

Could someone point me in the right direction? I would really appreciate it! Thanks

[arshiya01]

Here is another approach I am trying:

  const jsPsych = initJsPsych();
  // define the stimulus dataset
  var stimulus_dataset = ['vid1','vid2','vid3','vid4','vid5'];

  // define the survey question and options
  var survey_question = "Please select the options that apply:";
  var survey_options = ["Option 1", "Option 2", "Option 3", "Option 4"];

  // define the timeline for the experiment
  var timeline = [];

  // iterate over each video in the stimulus dataset
  for (var i = 0; i < stimulus_dataset.length; i++) {
    var video = stimulus_dataset[i];

    // define a trial to play the video
    var video_trial = {
      type: JsPsychVideoKeyboardResponse,
      stimulus: video,
      prompt: 'Press space to continue'
    };
    timeline.push(video_trial);

    // define a trial to present the survey
    var survey_trial = {
      type: JsPsychSurveyMultiSelect,
      question: survey_question,
      options: survey_options,
      on_finish: function(data) {
        // retrieve the number of options selected
        var num_selected_options = data.response.Q0.length;

        // iterate over the number of selected options
        for (var j = 0; j < num_selected_options; j++) {
          // define a trial to play the video
          var video_slider_trial = {
            type: JsPsychVideoSliderResponse,
            stimulus: video,
            prompt: 'hello' +i,
            autoplay: false,
            controls: true,
            labels: ['Not at all', 'Extremely'],
            require_movement: true,
            button_label: "Continue",
          };
          timeline.push(video_slider_trial);
        }
      }
    };
    timeline.push(survey_trial);
  }

  // initialize the jsPsych experiment
  jsPsych.run(timeline);