Dennis Orthner of the University of North Carolina at Chapel Hill School of Social Work says interaction -- such as a large holiday family gathering -- occurs only on special occasions, making them less familiar.

"When families are able to spend time interacting, keeping it positive, studies have shown that it is good for a person's overall well-being," Orthner says in a statement. "The holidays are an opportunity for families to re-engage with one another, to open up channels of communication that are rusty. But you have to keep it positive."

To help keep family gatherings more positive, Othner suggests:

-- When someone makes disparaging comments use the classic communication technique of redirection, "Let's talk about that later." Then change the subject.

-- To prevent tension at family gatherings spend time listening. Avoid stressful topics. Don't try to heal a big wound. Keep it light.

-- Reconnect with family by trying new, interactive activities, such as bowling or ice skating.

-- Keep the positive interaction going after the holidays. Plan regular family outings, with varied activities.