javascript - jsPsych中的固定交叉

Question

我正在尝试为jsPsych的实验添加注视十字架。我对js很新。

这是我所拥有的：

var test_stimuli = [
      {
        image: "img/blau_links.png",
        data: { correct_response: 37 }
      },
      {
        image: "img/blau_rechts.png",
        data: { correct_response: 37 }
      },
      {
        image: "img/gruen_links.png",
        data: { correct_response: 39 }
      },
      {
        image: "img/gruen_rechts.png",
        data: { correct_response: 39 }
      }
];



var all_tests = jsPsych.randomization.repeat(test_stimuli, 50, true);

var post_test_gap = function() {
    return Math.floor( Math.random() * 1500 ) + 750;
}

var test_block = {
    type: "single-stim",
    stimuli: all_tests.image,
    choices: [37, 39],
    data: all_tests.data,
    timing_response: 1500,
    timing_post_test: post_test_gap
};

var fixation_trial = {
    type: 'single-stim',
    stimuli: ['<p style='text-align:center'>+</p>'],
    is_html: true,
    timing_response: 500,
    timing_post_trial: 0,
    choices: 'none'
}

var experiment = [];
    experiment.push(instructions_block);
    experiment.push(trial_block);
    experiment.push(posttrial_block);
    experiment.push(fixation_trial);
    experiment.push(test_block);
    experiment.push(debrief_block);

    /* start the experiment */
    jsPsych.init({experiment_structure: experiment,
      on_finish: function() {
        jsPsych.data.displayData();
      }

我现在想要的是在每次测试块之前添加一个固定十字。在当前形式下，所有刺激仅显示一次。任何帮助表示赞赏。

Answer 1

这是一个使用jsPsych-6.0.5和'html-keyboard-response'插件（而不是'single-stim'）编码的固定块：

var fixation = {
  type: 'html-keyboard-response',
  stimulus: '<div style="font-size:60px">+</div>',
  choices: jsPsych.NO_KEYS,
  trial_duration: 800 // in ms
}; 

此固定块可以通过推功能包含在您的时间轴中：

experiment.push(fixation);