明晰夢の体験頻度と悪夢の頻度、夢見における感覚別、 感情別体験頻度との関連 ―大学生を対象とした24年間の調査結果をもとに―

Two large surveys of university students examined factors linked to how often people have lucid dreams. The first study, with about 700 students, found that lucid dream frequency was not significantly related to imaginative ability but was influenced by two factors: how often people had nightmares and how often they recalled their dreams. The second study, with about 7,900 students, identified two subgroups among frequent lucid dreamers: one group that also had frequent nightmares and distressing negative dreams, and another group with few nightmares and more positive emotions. Those who frequently experienced both nightmares and lucid dreams reported slightly less vivid colors in their dreams compared to those without lucid dreams.

Study at a glance

Abstract

I investigated individual differences in the frequency of lucid dreams experienced by university students and related factors. In Study 1, approximately 700 university students were surveyed regarding lucid dreams, nightmares, the frequency of sensory experiences in dreams, vividness and control of imagery, fantasy proneness, and nightmare distress. Results indicated that the frequency of lucid dreaming was not significantly related to imaginative ability, while covariance structure analysis indicated that the frequency of lucid dreaming was influenced by two systems: the frequency of nightmares and the frequency of dream recall. In Study 2, approximately 7,900 university students were surveyed. Four groups with the 5% highest or lowest frequency of lucid dreams and nightmares were examined for intergroup differences in the mean frequency of sensory and emotional experiences in dreams. Results suggested that among the group with a high frequency of lucid dreams, there may be a group with nightmare-related experiences that frequently experiences distressing negative dreams and a group with few nightmares and a high proportion of positive emotions that are unrelated to nightmares. Moreover, results indicated that those who frequently experienced nightmares and lucid dreams may experience slightly less vivid colors in their dreams than those who did not experience lucid dreams.