Figure 2.

Evidence accumulation and presurgical severity. (A) Preoperative OCD severity (YBOCS) in OCD subjects on DBS is negatively linearly associated with objective probability at the time of decision. (B) This relationship with objective probability was related to differing responding styles (low or high evidence accumulation, both associated with lower probability). (C) For illustration purposes, the objective probability of the task (i.e. that the correct jar was correct based on the available evidence) is plotted for each trial averaged across the three blocks. Model fits and P-values are reported in the text.