I deleted the previous post because I read 2 comments for you in 2 different places and I get confused. Anyway, I am re-posting it for other people who may want to know about i-730.
If your dependents, spouse and children, were in the US, applicant has to include them in his application. They perform fingerprint and should be present in the interview. And if the applicant granted asylum, the whole family will granted as well. On the other hand, if either spouse or children isn't in the US, the member who is not in US will be mentioned in the application, but will not grant the asylum if the main applicant has been granted it.
In this case, the applicant should file i-730 for this family member as an asylee derivative.
If the i-730 was granted, the derivative will be issued a visa to enter US and then apply for EAD immediately and permanent resident after 1 year.