Several reasons have been proposed for the findings— ... less depression associated with matters beyond direct control, greater social contacts, and positive emotions and attitudes.
-- Maybe true of some religious groups, but not Jehovah's Witnesses. They suffer from more depression than the general population, and there are way too many suicides among active Witnesses to believe they are guided by Gods spirit, or have a 'spiritual paradise' that no one else has.
-- Witnesses also have fewer social contacts, since they view anyone not in their religion as 'worldly' and avoid associating with them.
-- The extreme negativity of JWs is one of the reasons that I left the organization. What a genuine relief to be free; it was a step that I can feel the positive effects of daily.