Just some background on the IGT, so that it’s clear what their conclusion is based on:
…your “value-based decision making” is evaluated based upon your choosing of random cards. Here another interesting study:
The observations of this study indicate that EV is not predictive for choice behaviors as suggested by IGT. It seems that immediate gain eventually resulted in a long-term loss. The basic assumption of IGT is thus no longer plausible to assure the foresighted decision makers in the Iowa Gambling Task.