Terrell Harris spent two years in prison on a drug charge when his son was a toddler.

Now, he worries about the effects of that absence.

“I’ve noticed a change in my son because of me not being there and being incarcerated,” Harris says.

For little kids, having a parent gone “constantly puts them in a stressful situation,” Harris says. “They are wishing their dad was here.”

Emerging research suggests he’s right. Having a parent behind bars can poorly impact a child’s behavioral, emotional and even physical health. A new community-led research project in Indianapolis seeks to understand that link more clearly.

“Really young children, the most important thing is going to be positive relationships,” says Angela Tomlin the research project’s early childhood specialist. “In a state like Indiana, where incarceration is so high, children are getting separated from their parents. We know when that happens, it’s really difficult for the kids.”

Indiana has one of the highest incarceration rates in the country. More than 1 in 10 Indiana children have a parent who has been incarcerated, the second highest rate in the nation. Recent research has focused on how this loss can impact children’s health – mind and body.

The research project is a partnership between a community leader Shoshanna Spector, executive director of the Indianapolis Congregational Action Network (IndyCAN), and two academic researchers, Tomlin, who is the director of the Riley Childhood Development Center at the Indiana University School of Medicine and Karen Ruprecht, director of research and practice of Early Learning Indiana.

The study is being funded by the Robert Wood Johnson Foundation as part of its Interdisciplinary Research Leaders program which supports teams of researchers working together with community leaders.

The researchers seek to determine what health consequences Hoosier children and families are experiencing because of an incarcerated parent. They will also study and recommend solutions.

“People might immediately think mental health problems but the research is showing that children can have physiological effects that persist into adulthood like heart problems, shorter life expectancy and so on,” says Tomlin.

Tomlin says having a parent incarcerated can be a child’s first strike against them.

“So if you think about it, everything is related back to those early relationships and safe environments,” says Tomlin.

Besides the loss of that connection, a parent going to prison or jail can also mean the loss of income and the stigma of incarceration can make it difficult to connect with resources.

“When one parent is incarcerated it does make it harder for the family that is left behind and there is some evidence that standard of living is lowered. One parent is doing the work of two and support can make a difference,” says Tomlin.

The project kicked off last month when about 75 community volunteers gathered for a summit calling for the end of mass incarceration in Indiana. IndyCAN, hosted the event to inform and empower attendees to take action.

The volunteers are helping with the research. Starting this month, they will go into neighborhoods and identify families impacted by the absence of a member and ask how this has harmed the health of the family, especially the children.

Spector, IndyCAN executive director, says incarceration should be a last resort not a first response.

“No child should be afraid that they will never see their parents even if it’s just six weeks or six months when there are plenty of alternatives,” Spector says.

Alternatives like treatment and diversion strategies like crisis intervention. Spector says if communities don’t commit to reducing the number of people being incarcerated, the cycle will just continue.

“In a state where we lock up one in three African American men compared to 1 in 273 whites – we are traumatizing people for generations” Spector says.

The U.S. is the world leader of incarceration rates and Indiana has a 7 percent higher rate than the national average. In parts of the state a drug conviction can lead to decades in prison.

Some evidence points to the relationship of mass incarceration and racial health inequity. Black teens in Indiana are twice as likely to have a parent in jail as whites.

Terrell Harris’s wife served 10 years. She went to prison when her son was 2 and got out when he was 13.

“Imagine a son you’ve never seen all these years and to get out and try to be a mother,” says Harris. “Do you know how much resentment that child has because you were gone?”

A lot says Harris. And that resentment and stress has led to health problems.

“He suffers from PTSD and ADHD because he’s been in these messed up situations and he doesn’t know any better so he thinks, ‘OK, this is cool, I can be a gangster,’” Harris says.

Tomlin, the research project’s psychologist, says that’s typical.

“Stress over time can build up and what we’ve been finding is that stress can persist into adulthood,” she says.

IndyCAN’s research project kicked off this month. Harris and community volunteers will be going into the communities to talk to people who have been impacted by incarceration of a loved one.

The group hopes to present their findings to the Indiana legislature next year.

This story was produced by Side Effects Public Media in collaboration with Indiana Public Broadcasting.