Approximately, what percent of people use their left brain for speaking, writing, and understanding language?

Rachel is learning to tie her shoes. As she tries to tie her sneaker laces she says out loud "cross over and pull—now make bunny ears and put one under the other." Rachel is using

A) conservation. B) processing capacity. C) private speech. D) overregularized speech.

The most common cause of a young infant's cry is

A) hearing a startling noise. B) a novel stimulus. C) fatigue. D) hunger.