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* project: Open Source, Web-based IAT
* author: Winter Mason (winteram@yahoo-inc.com)
* source: http://sourceforge.net/projects/implicitassoc/
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OVERVIEW:
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This is meant to be an easy-to-use implicit association test (see
Greenwald, McGhee, & Schwartz, 1998) for use by interested psychologists.
The input is a basic text file that defines the categories and the stimuli
(or location for the stimuli if they are image files). The flow of the
test is driven by javascript, and participant responses are stored in a
comma-delimited text file. At the end of the test, a simple effect size is
calculated to determine the participant's tendency to find two categories
more congruent than the other two categories.
REQUIREMENTS:
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Server-side: PHP (with permission to write files in directory)
Client-side: Javascript-enabled web browser
USE:
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1) copy the folder to a publicly accessible folder on your web server
2) modify the file "IATname.inc":
a) set the variable $IATname to the name of the IAT (e.g. "Race" if it
were a Race IAT)
b) if you are (not) using images as stimuli, change $pictures to "true"
("false")
3) modify the file "input.txt":
- "showResult" can be true or false. It determines whether the particpant
receives feedback on their test.
- "catA" and "catB" are the target categories, "cat1" and "cat2" are the
association categories. DO NOT MODIFY THESE LABELS.
- Each category has 4 components:
1. "label" is what is displayed to the participant in the
instructions and during the task
2. "datalabel" is how the category is identified in the output
3. "itemtype" can be either "txt" or "img"
4. "items" are either the words to be displayed (if "itemtype" is
"txt") or the location of the image file to display (if "itemtype"
is "img")
- Make sure everything is surrounded by double quotes!
4) Modify "writeFile.php": set the variable $base_dir to the directory
where you would like to keep the output
5) Direct your browser to http://yourserver.com/implicitassoc/trunk/
INCLUDED FILES:
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Correct.jpg
- A picture of a checkmark, to notify user if they have javascript enabled
gInstruct1.html
gInstruct2.html
gInstruct3.html
gInstruct4.html
gInstruct5.html
gInstruct6.html
gInstruct7.html
- These are the instructions that are inserted into the frame before each
stage of the IAT
iat.css
- This file provides the CSS styling for the web page
IAT.js
- This is the javascript code for reading the input file, creating the
pages, listening to user responses, and recording the user responses
IAT.php
- This is the main page that contains the frame in which the stimuli and
instructions appear
IATname.inc
- This defines the name of the IAT (e.g., "Race IAT") presented in the
instructions
index.php
- This is the entry point for the user that requires the user to enable
javascript to continue
input.txt
- This is the file that defines the stimuli and category labels for the
IAT
instruct1.php
- This is the first page of instructions before the IAT begins,
explaining what comes next
instruct2.php
- This is the second page of instructions,
jquery.min.js
- Required jQuery library. See http://jquery.com
spinner.gif
- An animated gif of a "spinner", displayed while calculating IAT score
for participant
writeFile.php
- This file is called to write the output file to the server
Wrong.jpg
- A picture of an 'X' that appears if the participant choose the
incorrect category
