New research suggests that mobile device use at the dinner table could lead to few interactions between mother and child.

Researchers Boston University Medical Center found that mothers with the most mobile device use had 20 percent fewer verbal and 39 percent fewer nonverbal interactions with their children than mothers who had no or negligible use while eating.

According to the researchers, nonverbal interactions are a primary mode through which emotional content is communicated between parents and children, so its frequent displacement could represent a significant decrease in emotional connection.

"We theorize that mobile device use was associated with a decreased number of maternal verbal and nonverbal interactions through decreased awareness of the child's social cues while the mother's gaze and/or attention was directed at a device," researcher Jenny Radesky said in a statement.

Parent-child interactions during meal time in particular show a protective effect on child health outcomes such as obesity, asthma and adolescent risk behaviors. These findings have been attributed to the positive family communication and emotional connection that mealtime routines allow. However, media use during meals has been shown to mitigate these benefits.

Researchers also found that during presentation of unfamiliar foods, which is usually stressful for young children, mothers with mobile device use showed 26 percent fewer verbal interactions and 48 percent fewer nonverbal interactions, suggesting that these moms may have been less "available" to help their child through this novel experience.

Because secure parent-child relationships are one of the strongest buffers against psychosocial stress, the researchers believe guidance is needed for how caregivers can use the rapidly evolving technologies in their homes in the healthiest ways possible.

"As mobile device ownership and use becomes nearly universal, these results may have important implications regarding how parents balance attention between devices and interactions with their children during daily life and during meals in particular, which are an important protective routine in pediatric health," Radesky added.

The findings are detailed in the online journal Academic Pediatrics.