Host the app on a web server

Host the app on a web server so that it is publicly accessible from a URL.

Launching the app

When redirecting the participant to the app you cann pass the following URL parameters in order to skip the registration page:

• condition: 0 is smooth, 1 is rough
• uid: participant ID
• age: participant age
• grade: participant grade

For example you can redirect the participant to the experiment by generating a URL like the following:

*http://APP-URL-ON-YOUR-SERVER.com/index.html?uid=1234&condition=1&age=33&gender=male*

Posting the experiment data to a server

When the participant finishes the experiment, the app posts the session data to the server specified at the beginiing of the js/isrc-utils.js file:

/**
 * URL of server where to post the data at the end of the experiment
 */
serverURI: "https://INSERT-SERVER-URL-HERE",

You need to create a server side script (for example a php script) that receives the data and saves it to a database. The data is passed using HTTP POST as a string in the the ‘data’ parameter.

Example PHP script:

<?php 
    $data = json_decode($_POST['data']);
    $participant_id = $data['uid'];

    // Save data to a database...
?>

Number of rounds

To change the number of rounds (included the bonus round) you can change the following variable in js/gridSearch.js:

totalTrialsNumber = 6, // includes the instructions trial and the bonus trial

Note: there are some hardcoded references to the number of rounds in the text.