jsPsychTrolleyProblem - Younes Strittmatter

Show a trolley problem to the participant. The participant has to decide whether to flip a switch to divert a trolley from a main track to a side track. The main track has a number of people on it, and the side track has a different number of people on it. The participant has to decide whether to flip the switch or not. When the participant flips the switch, the trolley will hit the people on the side track, but not the people on the main track. If the participant does not flip the switch, the trolley will hit the people on the main track, but not the people on the side track.

Parameters

Name	Type	Default	Description
main_track	COMPLEX	[{gender: "male", body_type: "business", skin: "white"}]	A list of objects that describe the people on the main track.
side_track	STRING	[{gender: "male", body_type: "business", skin: "white"}]	A list of objects that describe the people on the side track.
trial_duration	INT	null	The duration in ms the problem is show. If `null`, the problem is shown indefinitely
show_prompt	BOOL	true	Show a text explaining the problem.

Data Output

Name	Type	Description
action	STRING	Which action has been taken? `flip` the lever or do `nothing`.
choice	STRING	The choice (main_track or side_track)
rt	INT	The response time in milliseconds for the participant to make a response.
main_track	COMPLEX	A list of objects describing the people on the main_track.
side_track	COMPLEX	A list of objects describing the people on the side_track.

Loading

In browser

<script src="https://unpkg.com/@sweet-jspsych/plugin-trolley-problem@0.0.5"></script>

Via NPM

npm install @sweet-jspsych/plugin-trolley-problem

import jsPsychTrolleyProblem from '@sweet-jspsych/plugin-trolley-problem';

Compatibility

jsPsych 7.0.0

Examples

<!DOCTYPE html>
<html>

<head>
  <script src="https://unpkg.com/jspsych"></script>
  <script src="https://unpkg.com/@sweet-jspsych/plugin-trolley-problem"></script>
  <link rel="stylesheet" href="https://unpkg.com/jspsych@7.0.0/css/jspsych.css">
</head>

<body></body>
<script type="module">
  const jsPsych = initJsPsych({
    on_finish: function () {
      jsPsych.data.displayData();
    }
  });

  const trial = {
    type: jsPsychTrolleyProblem,
    main_track: [{ gender: "male", body_type: "business", skin: "white" }],
    side_track: [{ gender: 'female', body_type: 'pregnant', skin: 'black'
    }]
  };

  const trial_2 = {
    type: jsPsychTrolleyProblem,
    main_track: [{ gender: "female", body_type: "casual", skin: "white" }, {gender: "female", body_type: "elderly", skin: "brown"}],
    side_track: [{ gender: 'female', body_type: 'pregnant', skin: 'black'
    }]
  };

  jsPsych.run([trial, trial_2])
</script>

</html>