One of the most frequently used neuropsychological tasks to assess decision-making in ambiguous situation was the Iowa Gambling Task developed by Bechara and his colleagues.But many questions had no answer on this task.Some researchers found that the Iowa Gambling Task exclusively measured decisions under ambiguity and explained how the somatic makers in body affect decision-making.Other researchers found that it could also be that complexity of componants in the IGT exerted crucial influence upon whether or not subjects figure out the rules during performing the task.There were other well-specified and parsimonious explanations that can equally well account for the IGT data

such as working memory

controlling and shifting

and so on.All these issues had been reviewed and problems had been pointed

including the order of the decks

the tools of analyzing data.At last

some advice had been given for the future study.