Frequently Asked Questions
Can I run the program from a USB drive?
Yes! Just put the FreeIAT.exe and config.txt
files on a USB drive and run them from anywhere (e.g., computer lab). Note,
however, that the "check for updates" feature will not work without other
Can the program counter-balance the order in which the pairs are administered ?
Currently, no - but by design. There appear to be order effects such
that the first set of pairings are typically faster than the second set (i.e.,
Block 3 is faster than Block 5). It is intuitively appealing to "control"
for this via counter-balancing. However, this is a bad idea for most
If the goal is to get an accurate mean estimate of the population IAT
scores, then by all means counter-balancing is appropriate. However, most
researchers treat IAT scores as individual difference variables for which
correlations with other variables will be computed. Given the arbitrary
metric of IATs, mean values are seldom of interest. Therefore, it is best
to hold the order effect constant across all respondents by using the same administration
order so as not to introduce systematic construct-irrelevant (i.e., error) variance
into your data.
If you insist on counter-balancing, simply create two versions of your IAT. Just copy all of the files from your IAT directory into a second directory and change the Config.txt file. Then you can simply run either IAT program you wish in counter-balanced order.
The IAT won't load - I get an error saying the program won't start
Most likely you are trying to run the program on a computer that does not have version 3.5 of Microsoft's .NET Framework installed. You can download that here.
Can the program collect data via the internet?
How accurate is the response time measure in the FreeIAT?
Short answer: I don't know. I'm not sure how one would go about testing the accuracy of response time in a program such as this. However, the program uses Microsoft's .net framework and the time is assessed with your computer's clock. Bias and accuracy are entirely different issues. Accuracy relates to how close to actual reaction time the measure of reaction time is. Bias relates to systematic error in measurement (for instance consistently over-reporting the response time in only Block 3 but not the other blocks). It's impossible for me to see any way that bias (i.e., consistently underestimating only one block of responses) would result given the code. The code used in Blocks 3 and 5 (which fully determine the IAT score) is identical. If there is error (say the clock is off by a few thousandths of a second) it is dwarfed by the inherent error present in any psychological measure. Said differently, the IAT as a method has thousands of times more error than any computer clock inaccuracy. I can't see how this would be an issue.
How do I find out validity and reliability information for the FreeIAT?
It's important to remember that the FreeIAT is just software. More generally, IATs are methods of collecting data that relate to particular constructs (such as attitudes). The reliability and validity of any IAT will depend largely on the content you supply when creating your IAT. You can search the literature for meta-analyses on the average reliability of IATs, but your IAT may vary quite a lot from any average. You should calculate reliability and establish validity for any IAT you create.