jsPsych/plugins/jspsych-call-function.js

/**
 * jspsych-call-function
 * plugin for calling an arbitrary function during a jspsych experiment
 * Josh de Leeuw
 *
 * documentation: docs.jspsych.org
 *
 **/

jsPsych.plugins['call-function'] = (function() {

  var plugin = {};

  plugin.info = {
    name: 'call-function',
    description: '',
    parameters: {
      func: {
        type: jsPsych.plugins.parameterType.FUNCTION,
        default: undefined,
        no_function: false,
        description: ''
      },
      // a rare case where we override the default experiment level
      // value of this parameter, since this plugin should be invisible
      // to the subject of the experiment
      post_trial_gap: {
        type: jsPsych.plugins.parameterType.INT,
        default: 0,
        no_function: false,
        description: ''
      }
    }
  }

  plugin.trial = function(display_element, trial) {

    var return_val = trial.func();

    var trial_data = {
      value: return_val
    };

    jsPsych.finishTrial(trial_data);
  };

  return plugin;
})();