Collected data on nightmare recall in 60 Swiss university students (51 men; 9 women; mean age 25.8 yr.; SD = 2.9 yr.). 50% reported having experienced at least one nightmare in the last two years, 36.7% no nightmare within this time span, and 13.3% were unable to remember.
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Zack Z. Cernovsky (1983) studied this question.
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