Studies of cognitive changes in later adulthood suggest an age related decline in___ intelligence.

__________ is the distinct quality of a sound that distinguishes it from other sounds. For example, the same note played on a piano or guitar has a different quality to the sound

a) Timbre b) Audition c) Volume d) Loudness

Most of the growth in the brain during middle childhood is from

A) growth in the blood vessels that spread through the brain. B) increases in glial cells. C) continued myelination of neurons. D) all of the above