National surveys show that on average, those who cohabit before marriage:

Having sex with many partners before marriage is a risk factor for divorce.

The median age of marriage for men and women has:

The family theory that divides the family experience into phases over the life span and describes changes in family structure and roles at each phase is:

The median age of marriage for men and women has:

Gottman’s first sign of divorce is the harsh startup.

According to the differentiation principle, the greater the differentiation:

The number of widows exceeds the number of widowers at all age levels.

Play with the father contributes to the growth of social skills and emotional expression in children.

The analog part of a message refers to: