It's both, actually. It seems to me that during the course of the trial, before they get to the process of deliberations, they're encountering a lot of stressful circumstances, with a lot of traumatic data in some cases. They may need counselling at that time. Even after that, once they get into deliberations, there's the whole aspect of the intensity of the deliberations themselves.
On December 11th, 2017. See this statement in context.