Difference between revisions of "Web-based perception experiments"
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A Javascript library [http://linguistics.berkeley.edu/~kjohnson/talkers/js/audexp.js audexp.js] makes it realatively easy to implement the following four kinds of typical experiment: |
A Javascript library [http://linguistics.berkeley.edu/~kjohnson/talkers/js/audexp.js audexp.js] makes it realatively easy to implement the following four kinds of typical experiment: |
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| − | * Identification - a single audio file is played, and a two-alternative forced choice (2AFC) is given. |
+ | * Identification (id) - a single audio file is played, and a two-alternative forced choice (2AFC) is given. |
| − | * Discrimination - two audio files are played, and a 2AFC is given. |
+ | * Discrimination (ax) - two audio files are played, and a 2AFC is given. |
| − | * Rating - a single audio file is played, and a rating number (from 1 to 7) is given. |
+ | * Rating (r) - a single audio file is played, and a rating number (from 1 to 7) is given. |
| − | * Contrast Rating - two audio files are played, and a rating number is given. |
+ | * Contrast Rating (cr) - two audio files are played, and a rating number is given. |
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::<script src="js/blocktest_list.js"></script> |
::<script src="js/blocktest_list.js"></script> |
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| + | * a call to load the experiment when the page is loaded |
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| + | ** this call specifies the type of experiment (in this case 'id') |
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| + | ** whether to randomize the order of presentation of the list of sound files |
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| + | ** the interstimulus interval for 'ax' and 'cr' types |
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| + | ** and the intertrial interval for all experiments. |
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Revision as of 18:23, 8 February 2018
Experiments can be hosted on the Department of Linguistics server, and then distributed to listeners by email link, or via Amazon Mechanical Turk.
An example is here: example experiment
A Javascript library audexp.js makes it realatively easy to implement the following four kinds of typical experiment:
- Identification (id) - a single audio file is played, and a two-alternative forced choice (2AFC) is given.
- Discrimination (ax) - two audio files are played, and a 2AFC is given.
- Rating (r) - a single audio file is played, and a rating number (from 1 to 7) is given.
- Contrast Rating (cr) - two audio files are played, and a rating number is given.
Your html code must have three features:
- source a javascript file that defines
- an array (or two arrays) of filenames that will be presented.
- a variable called 'block'
- here's an example of such a file
- this .js file was created with a small perl script from a .csv spreadsheet.
- the html header contains these two lines to get the audexp.js library and the experiment-specific list of sound files.
- <script src="js/blocktest_list.js"></script>
- <script src="js/blocktest_list.js"></script>
- a call to load the experiment when the page is loaded
- <body onload="load('id',false,500,2000);">
- this call specifies the type of experiment (in this case 'id')
- whether to randomize the order of presentation of the list of sound files
- the interstimulus interval for 'ax' and 'cr' types
- and the intertrial interval for all experiments.
