The most generalizable findings are most likely to be found in a survey with

I believe the answer is: questionnaires that gather data analyzable using computers.

generalizable findings are the type of findings that is extracted from large number of sample population. It would be really expensive to gather such data using manpower alone, which is why the data collection process tend to be done using computers.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.