I think it's a mistake to try to solve the problem by delving deeper and deeper into human psychology and making the psychological sieve finer and finer in an effort to select only the 'right kind' of people for a jury. The problem with it is that the further its taken, the more it becomes obviously biased, and easily challenged. The only way you can seek to neutralize random psychological limitations is by introducing more random psychological elements to balance them out, in a true random, unbiased manner. This means allowing a majority verdict rather than a unanimous one. I don't see any other way to do it and remain unbiased.For DP cases in jury selection I do think there needs to be 1 final step. Have each member of the potential jury pool meet with a professional that can really be sure they understand what they may be asked to do if the jury is leaning towards signing a DP form.
I think this last step would eliminate quite a few people that didnt think it through all the way to the very end. Its hard for normal folks to grasp what they may end up having to decide on and sign their name to.
I think having a last step like that would help to be sure the jury panel could fulfill their duties if the jury decides on a DP.
I think too many people think they can do it and at the very end they begin to struggle with it. Having a last step like this may help.
Also a unamimous verdict like 9-3 or more rather than total majority would go a long ways in helping the process. That alone would be a nice change to make and simple to make that change.