Postural balance in frequent lucid dreamers: a replication attempt.

Frequent lucid dreamers show better static balance, as measured by lower center of pressure velocity on a force plate, compared to other participants, partially supporting a vestibular contribution to lucid dreaming. In a study of 131 adults who kept dream logs and performed balance tasks, lucid dreaming frequency correlated globally with better balance. Flying sensations in men's dreams and greater dream control in women's dreams were also linked to better balance. However, body height and sleepiness confounded some effects. The findings support the view that the vestibular system underlies basic aspects of bodily self-consciousness, such as self-agency and self-location, during both wakefulness and dreaming.

Study at a glance

Abstract

Early research suggests that the vestibular system is implicated in lucid dreaming, e.g. frequent lucid dreamers outperform others on static balance tasks. Furthermore, gravity-themed dreams, such as flying dreams, frequently accompany lucid dreaming. Nonetheless, studies are scarce. We attempted to: (1) replicate previous findings using more sensitive static balance measures and (2) extend these findings by examining relationships with dreamed gravity imagery more generally. 131 participants (80 F; Mage=24.1 ± 4.1 yrs) estimated lucid dreaming frequency then completed a 5-day home log with ratings for dream lucidity awareness, control, and gravity sensations (flying, falling). They then performed balance tasks on a sensitive force plate, i.e. standing on one or both feet, with eyes open or closed. Center of pressure (CoP) Displacement and CoP Velocity on each trial measured postural stability. Findings partially support the claim of a vestibular contribution to lucid dreaming. Frequent lucid dreamers displayed better balance (lower CoP Velocity) than did other participants on some trials and lucid dreaming frequency was globally correlated with better balance (lower CoP Velocity). Lower CoP Velocity was related to flying sensations in men's dreams and with more dream control in women's dreams. However, body height-possibly due to its relationship to sex-and levels of sleepiness confound some of these effects. While findings only provide a partial replication of previous work, they nonetheless support an emerging view that the vestibular system underlies basic attributes of bodily self-consciousness, such as feelings of self-agency and self-location, whether such consciousness occurs during wakefulness or dreaming.