Parents in low-SES households read to their children an average of just _____ hours between the ages of one and five

Nightmares are to ________ as night terrors are to ________.

a. REM sleep; Stage 4 sleep b. narcolepsy; sleep apnea c. delta waves; alpha waves d. Stage 4 sleep; Stage 1 sleep e. Stage 1 sleep; REM sleep

Research participants have the right to withdraw from a study at any time and for any reason.

a. true b. false