I can't put a fixation cross within a randomized code. Can you help me?

[Ricardo-Piccolo]

I'm trying to put a fixation cross (+) in the middle of each stimulus. Those stimuli have to be randomized, but the fixation cross does not. How can I write a code like that? (e.g. cross, randomized stimulus cross, randomized stimulus, cross... and so on). Here's the current code (a part of it):

var test1_trials = {
timeline: [test1],
timeline_variables: [
{stimulus: 'cenoura.jpeg'},
{stimulus: 'cenoura.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
{stimulus: 'coelho.jpeg'},
],
randomize_order: true
};
timeline.push(test1_trials);

[jodeleeuw]

Hi @Ricardo-Piccolo,

This is covered in step 6 of the tutorial. Basically you just add the fixation trial to the timeline of test1_trials:

var test1_trials = {
	timeline: [fixation, test1],
	...
}

[Ricardo-Piccolo]

Thanks for your time! I did this but still it is not adding the '+'.

var test1 = {
type: 'image-keyboard-response',
choices: ' ',
stimulus: jsPsych.timelineVariable('stimulus'),
post_trial_gap: 300,
response_ends_trial: false,
trial_duration: 1300,
};

    var test1_trials = { 
    timeline: ['+', test1],
    timeline_variables: [
            {stimulus: 'cenoura.png'},
	        {stimulus: 'cenoura.png'},
	        {stimulus: 'coelho.png'},
	        {stimulus: 'coelho.png'},
	        {stimulus: 'coelho.png'},
            {stimulus: 'coelho.png'},
            {stimulus: 'coelho.png'},
            {stimulus: 'coelho.png'},
            {stimulus: 'coelho.png'},
            {stimulus: 'coelho.png'},
    ],
    randomize_order: true
    };
    timeline.push(test1_trials);

[jodeleeuw]

Please check out the tutorial. It covers exactly the steps that are needed to implement it.