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Study: More Dads will do diapers but not baby talk

| Tuesday, May 26, 2015, 9:00 p.m.

Modern dads may change diapers and fill sippy cups, but you still won't catch them using baby talk.

That's according to a new study by researchers at Washington State University, Spokane, who found that while mothers often use high-pitched tones and varied cadences to communicate with their babies and toddlers, fathers play it straight, speaking to their little ones as if they were adults.

“Moms raised their pitch by around 40 hertz,” a verifiable change in sound, said Mark VanDam, a WSU-Spokane assistant professor in the speech and hearing sciences department. “Dads had no statistical effect at all.”

VanDam based his findings on intensive study of 11 families with toddlers about 2½ years old. They're among a larger pool of 120 families who have provided more than 2,000 days of data for analysis.

Using a newly developed voice-recognition device tucked into a toddler's T-shirt, VanDam recorded each parent and child duo for about 13½ hours and, then, analyzed the results.

It's the first study to examine fathers' verbal interactions in a real-world setting using automatic data processing, said VanDam, who presented his results recently at a meeting of the Acoustical Society of America in Pittsburgh.

VanDam and his team were looking for signs of what's been dubbed “motherese,” the kind of sing-song baby talk long associated with communication between moms and their young children.

In an era of shifting parental roles, the researchers wondered whether modern fathers modified their speech in the same way that mothers do.

The answer, VanDam found, is no. Dads spoke to their babies using intonation patterns very similar to those used when talking with adults.

But, he was quick to note, that's not a bad thing.

Although motherese is believed to be a bonding tool, a kind of communication that's particularly engaging to young children, the fathers' style is likely equally important, he said.

“We think that the fathers are doing things that are conducive to their children's learning, but in a different way,” he said. “Moms provide the link to the intimate or the domestic. Dads provide a link to the outside world.”

That conclusion squares with what's already known about early parent-child communication, said Tonya Bergeson-Dana, assistant professor at Indiana University Medical School, which runs the Babytalk Research center.

“Even in singing to babies, moms will sing ‘Twinkle, Twinkle,' and ‘ABC' and dads will sing rock songs,” she said.

VanDam detected some other differences in the ways that moms and dads communicate with their kids.

“Moms talk a lot more, both in overall words and in minutes of talking,” he said. “Dads use fewer words. Even though they speak fewer words, they use a wider variety of words.”

Together, both modes of communication are vital to the child, he added.

“Different parents, different people play different roles in developing children's lives,” he said.

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