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When parents deploy to a war zone, their absence can have ripple effects that are felt long after they return home. Parents and their children often struggle to figure out how to be a family again after leading separate lives for months or years.

From St. Paul, Minnesota Public Radio's Jess Mador reports on a new effort to smooth the transition from combat to home life.

JESSICA MADOR, BYLINE: A small but groundbreaking study is attracting attention from military leaders and Congress for its potential to help troops and their families to weather the challenges of deployment. The study, at the University of Minnesota, comes amid growing recognition that supporting military families at home makes soldiers stronger at war.

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MADOR: It's dinnertime at the Ross house in the Twin Cities suburbs.

KEVIN ROSS: Hey Isaac, can you help set the table please?

MADOR: National Guard soldier Kevin Ross asks his two-and-a-half-year-old son Isaac to put plastic cups on the table for him and his two sisters. With the help of a new parenting study, Ross has recently changed the way he talks to his three children. Before, Ross says he would have talked to them like he talks to the soldiers he commands and expected them to obey without talking back.

KEVIN ROSS: Probably would have asked him once or twice and gotten frustrated and done it myself.

MADOR: The Rosses are one of more than 120 military families participating in the University of Minnesota study. It's called ADAPT, for After Deployment Adaptive Parenting Tools. Researchers in the study observe families and offer them special discipline and communication techniques to try at home. Lead investigator Abi Gewirtz says the idea is to reduce the kind of stress that can cause conflict between parents and kids.

ABI GEWIRTZ: What we know about families under stress, whether it's stress due to deployment or stress due to any other family transition, is that when families are stressed it's parenting that is hit.

MADOR: When a service member returns from deployment, parents have to renegotiate their relationship as a couple and their roles in the family as household routines are turned upside down. To prevent hurting children's development, the ADAPT study recommends parents get on the same page when it comes to discipline. The program teaches them to give short, simple face-to-face directions kids can understand and use praise and incentives to encourage good behavior.

While all families could use the ADAPT study techniques, they're especially helpful as troops transition from combat to the home front. Thirty-one-year-old National Guard soldier Kevin Ross says his family knows these challenges first hand. When Ross left for Iraq in 2009, he and his wife Emily had two children. When he returned they had three. Ross was away from home for about 18 months. For Emily, single-parenting while he was gone was tough. It was an even bigger adjustment when her husband got home.

EMILY ROSS: And his responsibilities were all centered around him, and then coming back to a household of five people and a wife who's been dealing with it alone all this time and is ready for a break, I think it took some time for him to readjust to even what his responsibilities in the family were.

MADOR: She says the parenting techniques they've learned in the study have made a big difference - their kids don't follow directions every single time, but they now know what's expected of them. She says she'd like to see the study expanded to help military families nationwide.

EMILY ROSS: It should almost be a requirement for families going through this that they go through training like this. You know, they train the soldiers; you might as well train the families along with them.

MADOR: ADAPT researchers want the same thing. Over the next five years, the study will recruit a total of 400 more families and follow them. Eventually, they hope their findings can be shared with military families across the U.S.

For NPR News, I'm Jess Mador. Transcript provided by NPR, Copyright NPR.