Since you mentioned being a dual language family, are there ways the verbal environment is different for your second child, ie did the language family members use shift away from the testing language? Which language are the kids using among themselves during play? Which language with the nanny? was the older kids formal schooling in the testing language? All of these can make a difference.
Yes,yes and yes. I didn't realize it would make that much of a difference, but reflecting on the differences, it makes sense. The nanny speaks English as a second language. The older child was in school for more time.
