Our paper developing a model of trial-to-trial self-control measures was just accepted at Cerebral Cortex! After testing several model variants, we concluded that a model with an active suppression of a tempting, but inferior choice option provided the best fit to choice response time data across subjects (hierarchically). Perhaps more interesting is that the single-trial parameters of this inhibitory process correlated strongly with brain regions commonly associated with cognitive control.
On Wednesday, December 6th, James Palestro became the first student in the MbCN lab to complete his masters thesis. James’ work focuses on a recent debate between fixed and collapsing boundary models, which argue either against or for a temporal component of decision making. He reports an experiment of speeded two-alternative forced choice decisions using a mixture of free response and interrogation paradigms to differentiate the qualitative and quantitative predictions of the two model classes. In the end, his results suggest that some task demands induce a collapsing bound strategy.