Using time-out appears less injurious than hitting, spanking, or yelling, because it does not involve physical or verbal abuse. It is therefore thought to represent some degree of progress in our continual striving to make this world a better place for children. According to many educators and psychologists, however, time-out is not as innocent as it seems and is, moreover, an emotionally harmful way to discipline children. In fact, the National Association for the Education of Young Children includes the use of time-out in a list of harmful disciplinary measures, along with physical punishment, criticizing, blaming, and shaming.
— Dr Aletha Solter

Read Dr Solter’s article on The disadvantages of timeouts

Parents should recognize that having their babies cry unnecessarily harms the baby permanently,” Commons said. “It changes the nervous system so they’re overly sensitive to future trauma.
— Commons and Miller

You can read more about this research here.

Why is challenging behavior more of an issue these days? I think much of it results from changes to early childhood education. From the emphasis on academics and accountability, and the attempt to accelerate child development. Following are seven reasons I believe are behind the increase in disruptive behavior.
— Rae Pica

Read this article here.

The key to healthy and effective discipline is our attitude. Toddlerhood is the perfect time to hone parenting skills that will provide the honest, direct, and compassionate leadership our children will depend on for years to come.
— Janet Lansbury

Read more about this here.