You’re misconstruing the basis of the study. Cause is not interchangeable with parameter.
The focus and context of the study was poverty, not stress. One done on stress might provide some relative material, and be useful, but your assumption is a bit irresponsible.
The focus and context of the study was poverty, not stress. One done on stress might provide some relative material, and be useful, but your assumption is a bit irresponsible.