Delta waves occur during:
a. REM sleep.
b. NREM sleep.
c. paradoxical sleep.
d. waking.
B
Psychology
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Since the 1990s, HIV transmission rates among intravenous drug users have been reduced from about 50% to about 10%. According to the text, which of these factors led to this decrease?
A. syringe exchange programs B. sexual abstinence education C. increased Narcotics Anonymous attendance D. decreased use of hormonal contraceptives
Psychology
What is the proposed cause of selective mutism?
A. Genetics B. Abuse C. Shy parents D. There is no proposed cause.
Psychology