By HILARY STOUT

Many in today’s generation of parents would never spank their children. We congratulate our toddlers for blowing their nose (“Good job!”) and we spend hours teaching our elementary-school offspring how to understand their feelings. But, incongruously and with regularity, this is a generation that yells.

“I’ve worked with thousands of parents and I can tell you, without question, that screaming is the new spanking,” said Amy McCready, the founder of Positive Parenting Solutions, which teaches parenting skills in classes, individual coaching sessions and an online course. “This is so the issue right now. As parents understand that it’s not socially acceptable to spank children, they are at a loss for what they can do. They resort to reminding, nagging, timeout, counting 1-2-3 and quickly realize that those strategies don’t work to change behavior. In the absence of tools that really work, they feel frustrated and angry and raise their voice. They feel guilty afterward, and the whole cycle begins again.”

To research their book “Mommy Guilt: Learn to Worry Less, Focus on What Matters Most, and Raise Happier Kids,” the three authors, Devra Renner, Aviva Pflock and Julie Bort, commissioned a survey of 1,300 parents across America to determine sources of parental guilt. Two-thirds of respondents named yelling as their biggest guilt inducer.

“What blew us away about that is that the one thing you really have ultimate control over is the tone of your voice,” said Ms. Pflock, a child development specialist.

“Yelling is done when parents feel irritable and anxious,” said Harold S. Koplewicz, the founder of the New York University Child Study Center. “It can be as simple as ‘I’m overwhelmed, I’m running late for work, I had a fight with my wife, I have a project due ? and my son left his homework upstairs.’ ”

Numerous studies exist on the effect of corporal punishment on children. A new one came out in September. Led by a researcher at Duke University’s Center for Child and Family Policy, the study concluded that spanking children when they are very young (1-year-old) can slow their intellectual development and lead to aggressive behavior as they grow older. But there is far less data on the more common habit of shouting and screaming in families.

One study that did take a look at the topic ? a paper on the “psychological aggression by American parents” published in the Journal of Marriage and Family in 2003 ? found that parental yelling was a near-universal occurrence. Of 991 families interviewed, in 88 percent of them a parent acknowledged shouting, screaming or yelling at the kids at least once (though it didn’t specify how many did it more often) in the previous year.

“We are so accustomed to this that we just think parents get carried away and that it’s not harmful,” said one of the study’s lead authors, Murray A. Straus, a sociologist who is a director of the Family Research Laboratory at the University of New Hampshire. “But it affects a child. If someone yelled at you at work, you’d find that pretty jarring. We don’t apply that standard to children.”

Psychologists and psychiatrists generally say yelling should be avoided. It’s at best ineffective and at worse damaging to a child’s sense of well-being .

Still, there are those moments.

“I’d like to think that most of the time we have a good interaction based on reason,” Lena Merrill said of her 4-year-old daughter, whom she has never spanked. But then there are the times when “she’s done something like poured milk on the floor or ripped a page out of a book,” Ms. Merrill said. “I just lose it.”

Still, Ms. Merrill, a travel consultant in Rutherford, New Jersey, finds that the threat of yelling can be a convenient stick, much the way the threat of a spanking was in her childhood. Even her husband has taken to using it to encourage good behavior, she said, issuing the warning:
“Don’t make mommy mad.”