conditional trial #1319

jackkk23 · 2020-12-16T02:43:04Z

jackkk23
Dec 16, 2020

Hello,

I'm trying to add a feedback trial based on the previous response.
I want that there will be no feedback screen if the answer is correct, but there will be a feedback trial only if the answer is wrong.

I am not able to skip the no feedback screen when the answer is correct. ( There is an empty screen displayed when the answer correct )
What I want is basically below.

 if (correct_trials.count() != 1){
         return '<p style="color:white;">Wrong.</p>';
  }  
else { "Skip this trial" }

I tried to put jsPsych.finishTrial( ); inside of else{ }, but I got a screen with "undefined" shortly and the fixation screen didn't appear.
(I'm also not sure what parameter I should include )

Is it possible to skip?

I tried to make an if statement outside of the 'trials.push()' and create another 'trials.push()' inside of the if statement , but didn't work.

I also tried this below.

temp_duration = 0; //outside of trials.push( );
 {
                type: 'html-keyboard-response',
                stimulus: function(){
                    let test_trial = jsPsych.data.get().filter({file_name: p_left[i] +" , " +p_right[i]});
                    let correct_trials = test_trial.filter({correct: true});                    
                    if (correct_trials.count() != 1){
                        temp_duration = 2000;
                        return '<p style="color:white;">Wrong.</p>';
                    }                   
                }
                choices: jsPsych.NO_KEYS,
                trial_duration: temp_duration
}

This is the code I've got so far.

trials.push(
            {
              type: 'html-keyboard-response',
              stimulus: '<div style="color:white;font-size:80px;">+</div>',
              choices: jsPsych.NO_KEYS,
              trial_duration: fx_duration
            },
            {
              type: 'html-keyboard-response',
              stimulus: stim,
              choices: ['f', 'j'], 
              stimulus_duration: image_duration,
              data: trial_data,
              on_finish: function(data){
                data.correct = data.key_press == jsPsych.pluginAPI.convertKeyCharacterToKeyCode(data.correct_response);
              }   
            },
            {
                type: 'html-keyboard-response',
                stimulus: function(){
                    let test_trial = jsPsych.data.get().filter({file_name: p_left[i] +" , " +p_right[i]});
                    let correct_trials = test_trial.filter({correct: true});
                    if (correct_trials.count() != 1){
                        return '<p style="color:white;">Wrong.</p>';
                    }                   
                }
                choices: jsPsych.NO_KEYS,
                trial_duration: 2000
            }
            );

=> I got a screen with "undefined" for the trial_duration when the answer is correct. (The fixation screen appeared properly after the "undefined" screen)

Thank you so much!