119. What is a voluntary movement?
120. In what manner is will dependent on instinct?
121. Why do deaf children not acquire speech? Can they be taught to speak?
122. Why is the acquisition of foreign speech sounds by grown people often so slow?
123. What is the advantage to the organism of voluntary over instinctive action?
124. Can you describe the three stages of nervous development illustrating the proverb “A burnt child fears the fire”?