I think, Annie, that Y&Z can reinforce each other positively or negatively. For example, you can drive a person emotionally mad just by persuading him of enough false data. Some religions are really good at this. AND you can make him (or her) stupid by abusing him or her emotionally.   Good data tends to drive out bad, and positive emoitons tend to heal negative ones to some extent.

What starts the ball rolling in all cases is communication -- getting things said, understood and acknowledged so they can be let go of, or changed.

A