what does "valenced vis-a `-vis" mean regarding to this context

Question

In short, good and right referents pertain to consequences and conduct, respectively. An example will help clarify this distinction. Consider Robinson Crusoe’s situation before Friday arrives, isolated on a remote island. Crusoe needs food, so he plants a garden and diligently tends it. Hail destroys his crops. For Crusoe, this devastating result constitutes a detriment to his welfare that will surely feel unpleasant (i.e., negatively valenced vis-a `-vis the counterfactual of how much more pleasure a bumper crop Would have given him)

Answer 1

.... از نظر کروزو نتیجه این تخریب (از بین رفتن محصول در اثر بارش تگرگ) به رفاه او آسیب زده که مطمئناً ناخوشایند است (یعنی بار عاطفی منفی در مقایسه با این حقیقت جایگزین (/موقعیت غیر واقعی) که از یک محصول پر بار چه لذتی می توانست ببرد)

 

vis-a`-vis=در مقایسه با
bumper crop=محصول پر بار
counterfactual=حقیق جایگزین؛ موقعیت غیر واقعی