Yes! This!!!

I do not think spanking hands and butts communicates clearly to a child but instead teaches them it is okay to hit. I have never seen any research that supports it as positive teaching tool.

Time out worked quite well for my defiant ADHD child but fifteen months may be too early. Or not. You could try and see what happens. The general rule is time out for one minute for every year of age.

Young children have very short attention spans. That is one reason redirection works well.