The Iowa Gambling Task is an extreme example of Jingle Fallacy and schmeasurement.
In 100 articles we found 244 different ways of scoring it, 177 were never reused. Correlations between them range -.99 to .99.
At the same time, we show meta-analyses combine these results as if they’re equivalent.
Ian Hussey
How many versions of the Iowa Gambling Task (IGT) exist? And how much does this affect research using the IGT? More than you might think. 🧵
Annika Külpmann
Methodological Flexibility in the Iowa Gambling Task Undermines Interpretability: A Meta-method Review: https://osf.io/4g3vr
