A psychology student is studying the differences in dream content across sleep stages. Based on current sleep research, how does dream content in REM sleep compare to non-REM sleep?

• A. More abstract and less emotional in REM sleep.
• B. More vivid and complex in REM sleep.
• C. More focused on daily activities in REM sleep.
• D. Less likely to be remembered if occurring in REM sleep.

Answer: (B)