The distinction between a person's chronological age and his or her social age is one that was first emphasized by behavioral scientist ____________

What type of glial cells myelinate axons in the brain and spinal cord?

a. oligodendrocytes b. Schwann cells c. radial glia d. astrocytes

In general, boys are more likely than girls to display all of the following except

a. speech and language problems. c. autism. b. mental disorders. d. oppositional and conduct disorders.