Although friendships begin early in life, the nature of friendships tends to change as children grow older. When we reach adolescence, another layer of complexity, ____, is added to friendships

Every fourth or fifth module in your psychology textbook is a special module entitled Psychology in Action and is filled with practical ideas that students can relate to their own lives

Indicate whether this statement is true or false

During sleep, when is brain activity highest and muscle activity least?

a. Brain activity and muscle activity are least during REM. b. Brain activity and muscle activity are least during Stage 4 sleep. c. Brain activity is greatest during REM and muscle activity is least during Stage 4 sleep. d. Brain activity is greatest during Stage 4 sleep and muscle activity is least during REM.