Overview

Lucid dreaming is characterized by the dreamer’s awareness, while asleep, that one is dreaming.³ This unique state of consciousness permits the dreamer not only to observe dream action with conscious awareness but also (particularly in skilled lucid dreamers) to actively influence the course of dream events.² For much of the twentieth century, lucid dreaming occupied an ambiguous position in science. Early skepticism was substantial; the phenomenon was long considered esoteric or even superstitious, sometimes grouped with paranormal claims.⁵ The field underwent a fundamental shift in legitimacy following the pioneering laboratory work of Keith Hearne and Stephen LaBerge in the late 1970s, who demonstrated that lucid dreamers could execute pre-arranged eye movement patterns during REM sleep, providing objective, measurable evidence of the phenomenon.⁵

Today, lucid dreaming is recognized as an established research domain, with major scientific institutions worldwide conducting investigations and high-ranked journals publishing findings.⁵ Schredl’s contributions have been central to this legitimization, particularly through his systematic work on prevalence estimation, measurement standardization, and investigation of reported health applications. Working from the Central Institute of Mental Health in Mannheim, Schredl has addressed fundamental questions about how common lucid dreaming is, how to reliably assess it, and what benefits practitioners report experiencing.

Prevalence across populations

One of Schredl’s core contributions has been clarifying the wide variation in reported lucid dream prevalence and identifying the methodological factors responsible for these differences. Prevalence, the percentage of people who report having experienced at least one lucid dream in their lifetime, varies dramatically depending on the sample studied and how the question is asked.

In representative population surveys, prevalence figures are substantially lower. A large Austrian survey (N = 1000) found that only 26% of participants reported ever having had a lucid dream.¹ In contrast, university student samples consistently yield much higher rates, ranging from 71% to 92%.¹ Schredl’s research identified several factors explaining this variation. The presence of a clear definition or example of lucid dreaming within the questionnaire itself reduces misunderstanding and typically yields lower, more accurate prevalence estimates. Similarly, verification procedures, in which participants provide a recent lucid dream example that is then rated by a trained judge, tend to produce more conservative figures. Sampling methodology also matters: random or representative samples yield lower prevalence than convenience or self-selected samples, such as members of dream seminars or parapsychological associations.¹

Schredl’s work on lucid dreaming in children revealed important developmental patterns. In a large-scale UK library study, he found that lucid dream prevalence increases substantially with age: approximately 5% of 10-year-olds report lucid dreaming, rising to about 50% in children aged 12–14, and reaching 80–90% in adolescents aged 15–18.⁴ This developmental trajectory suggests that the cognitive capacities underlying lucid dreaming mature gradually through childhood and adolescence. Notably, a six-week training program in lucid dream induction techniques, including methods such as MILD (Mnemonic Induction of Lucid Dreams), reality checks, and re-dreaming, resulted in 92% of trained 10–12-year-old children experiencing at least one lucid dream, demonstrating that induction methods can substantially boost occurrence rates in young populations.⁴

Cross-cultural research has also been part of Schredl’s effort to establish prevalence baselines. A study of Japanese university students found prevalence rates consistent with Western samples, supporting the generalizability of lucid dreaming as a universal human phenomenon.¹ Regarding gender differences, large-scale surveys have not revealed significant differences in lucid dreaming frequency between men and women, contrasting with the well-established gender differences in general dream recall.¹

Measurement and questionnaire development

A critical gap in lucid dreaming research was the lack of standardized instruments to measure inter-individual differences in lucid dreaming skills. While reliable scales for measuring lucid dream frequency existed, questionnaires assessing the quality or depth of lucid dreaming ability (such as the capacity to control dream content or maintain lucidity) were absent from the literature.²

Schredl addressed this gap by developing the Lucid dreaming Skills Questionnaire (LUSK), a brief instrument designed to measure inter-individual differences in lucid dreaming abilities.² The LUSK captures multiple dimensions of lucid dreaming skill, including the dreamer’s ability to change or control dream events, maintain lucidity within a dream, and achieve insight into the dream state. This tool has proven valuable for researchers seeking to select participants with high lucid dreaming skills for laboratory studies, thereby reducing the financial and logistical burden of sleep laboratory research, a notoriously labor-intensive endeavor. By identifying individuals with strong baseline lucid dreaming abilities, researchers can increase the likelihood of capturing lucid dreams during limited laboratory sessions.²

Schredl’s measurement work also refined the assessment of lucid dream frequency. He employed an eight-point scale ranging from “never” to “several times a week,” which demonstrated high test-retest reliability over a four-week period (r = .89).³ This standardized approach has enabled consistent comparison across studies and populations. The distinction between prevalence (lifetime occurrence) and frequency (how often lucid dreams occur) is crucial: while prevalence may be relatively high in some populations, the actual frequency of lucid dreams (measured through dream diaries) remains quite low, typically less than 1% of all recalled dreams.⁴

Health and wellness outcomes

A significant motivation for lucid dreaming research has been the anecdotal reports of practitioners who claim therapeutic or wellness benefits. Schredl and colleagues conducted a survey to move beyond anecdote and examine whether lucid dreamers themselves perceive benefits for mental and physical health.³

The research revealed that lucid dreaming is employed for diverse purposes. In online surveys, approximately 80% of participants reported using lucid dreams for hedonistic activities such as flying or sexual experiences. However, 64% also reported using lucid dreams to influence unpleasant dreams or nightmares.⁵ More specifically, a relatively small percentage of lucid dreams (approximately 6.5%) were dedicated to “physical/mental healing,” yet this application was employed by 40% of lucid dreamers overall.³ The use of lucid dreams for healing purposes was associated with older age, female gender, and higher lucid dream frequency, suggesting that more experienced lucid dreamers are more likely to apply the skill therapeutically.³

Schredl’s survey-based approach captured self-perceived effects rather than objective clinical outcomes. Participants reported motivations including overcoming fears (such as using lucid dreaming as nightmare therapy), solving waking-life problems, and engaging in creative pursuits.³ While these self-reports are valuable for understanding how people use lucid dreaming, Schredl and colleagues acknowledged that empirical research into the long-term effects and benefits of lucid dreaming on mental and physical healing remains scarce, and that future research should employ rigorous methodologies to evaluate claimed therapeutic applications.³

The applications of lucid dreaming extend beyond personal healing. Lucid dreaming has been investigated for use in athletic training, problem-solving, personal development, and psychotherapy, particularly for the treatment of nightmares and depression.⁵ Additionally, lucid dreaming serves as a research tool in neuroscience and consciousness studies, enabling investigators to study the neural correlates of conscious awareness during sleep.⁵

Public perception and scientific legitimacy

Schredl has also examined how lucid dreaming is perceived by the general public and how this perception compares to its status in academic science. This work is particularly relevant given the historical association between lucid dreaming research and parapsychology, which has influenced public attitudes toward the phenomenon.

For much of the twentieth century, lucid dreaming occupied a precarious position in scientific discourse. Early skepticism was pronounced, with the phenomenon sometimes grouped alongside paranormal claims such as telepathy and UFOs, viewed by traditional science as “superstitious nonsense.”⁵ As recently as 1936, the Journal of Abnormal Psychology published arguments defending lucid dreaming against fellow psychologists who dismissed it as merely daydreaming.⁵ The legitimization of lucid dreaming as a scientific field accelerated following Hearne and LaBerge’s laboratory demonstrations in the late 1970s and early 1980s, with LaBerge’s findings eventually published in peer-reviewed journals.⁵

Today, lucid dreaming is an established field of academic study, with research conducted at major scientific institutions worldwide and findings published in high-ranked journals including Nature Neuroscience.⁵ However, Schredl’s research on public perception revealed that the general public’s understanding of lucid dreaming does not always mirror the scientific consensus. The phenomenon remains connected in popular discourse to parapsychology and paranormal features, reflecting its historical associations.⁵ This gap between scientific legitimacy and public perception underscores the importance of continued communication about lucid dreaming research and its grounding in neuroscience and sleep physiology.