After taking the survey I sent her an email suggesting asking the type of marriage one had - great, good, ok, bad - would be good question. The type of marriage or quality as she calls it, will affect how we answer the questions. this was her reply:
Hi Charlotte,
Thank you so much for your email. You raise a great point. The question on marital quality is such an important one. It may actually be the focus of one of next research endeavors. I will look at that website. Feel free to pass the survey along to your other caregiver friends. From the many I have talked to, you seem to be such amazing people.
Thanks,
Allison
I also told her about this site where she can get the information on spousal caregiving.