In a longitudinal study of older married adults in detroit, almost all widows and widowers their marriage.

In a longitudinal study of older married adults in Detroit, almost all widows and widowers Idealized their marriage.

In the longintudinal study, the research choose to study same subjects over the period of years, so most of the participants have been involved in their studies ever since they're married.
Most of the participants in this studies believed that other couple should make them as an example of how a true marriage should be.