University Library Heidelberg
May 30, 2020
Michael Schredl, Maria Gilles, Isabell Wolf et al.
2 citations
Dream recall frequencies exhibit large inter-individual differences, ranging from recalling a dream almost every morning to recalling a dream almost never. Although dream recall has been conceptualized as a stable trait, longitudinal studies in this area are scarce. Within the framework of a complex study, 279 women (mean age: 31.76 ± 4.73 yrs.) completed a brief sleep questionnaire three times...
May 27, 2020
Michelle Carr, A. Stocks, Remington Mallett et al.
Lucid dreaming (being aware that one is dreaming) is typically a positive experience that may enhance positive mood even after waking. There is concern, however, that lucid dreaming may interfere with sleep quality. In the current experiment, participants practiced common lucid dream induction techniques over the course of a week, and kept a daily sleep and dream diary. The study objective was...
Clocks & Sleep
March 1, 2020
Michael Schredl, Sophie Dyck, Anja Kühnel
22 citations
REM periods with lucid dreaming show increased brain activation, especially in the prefrontal cortex, compared to REM periods without lucid dreaming and, thus, the question of whether lucid dreaming interferes with the recovery function of sleep arises. Cross-sectional studies found a negative relationship between sleep quality and lucid dreaming frequency, but this relationship was explained...
Frontiers in Psychology
January 28, 2020
Michael Schredl, Daniel Erlacher
7 citations
In addition to a large variety of somatic symptoms, fever also affects cognition, sleep, and mood. In an online survey with 164 participants, 100 fever dream reports were submitted. Fever dreams were more bizarre and more negatively toned and included more references to health and temperature perception compared to "normal" most recent dreams - findings that are in line with the continuity...
The American Journal of Psychology
September 18, 2019
Michael Schredl, Verena S. Struck, Christine Schwert et al.
5 citations
Abstract Although gender differences in the dreams of adults have been studied extensively, large-scale studies in children and adolescents are scarce. The UK Library Study collected 1,995 most recent dreams of children and adolescents. Boys reported more physical aggression and fewer female characters in their dreams, whereas indoor settings were more prominent in girls’ dreams, results that...
Psychology of Music
June 29, 2019
Nina König, Michael Schredl
13 citations
In every culture and nation music has been mentioned as a sort of natural language. While the existence of dreams including music in musicians has been anecdotally reported, music in dreams have been rarely studied empirically. In the present study, 425 participants, mostly psychology students, reported their dreams in a dream diary for 14 days as well as the intensity of their dream emotions...
University Library Heidelberg
May 23, 2019
Michael Schredl, Louisa Holyba, Tina Köllmer et al.
12 citations
The diagnosis of a nightmare disorder is based on clinically significant distress caused by the nightmares and, therefore, empirical research should focus on studying factors that affect nightmare distress in addition to nightmare frequency. Overall, 2056 persons (1212 woman, 844 men) completed the online survey. A reliable 6-item scale measuring beliefs about nightmares was developed. The...
Imagination, Cognition and Personality
March 25, 2019
Michael Schredl, Anja S. Göritz
A fascinating area of dream research is the analysis of long dream series. However, research regarding differences between long-term journalists and normal persons is lacking. The present online survey (N = 2,492) focused on the relationship between the Big Five personality dimensions and frequency of recording dreams. As expected, dream recall frequency, nightmare frequency, and attitude...
Journal of Sleep Research
February 1, 2019
Sarah F. Schoch, Maren J. Cordi, Michael Schredl et al.
Collecting dream reports typically requires waking subjects up from their sleep-a method that has been used to study the relationship between dreams and memory consolidation. However, it is unclear whether these awakenings influence sleep-associated memory consolidation processes. Furthermore, it is unclear how the incorporation of the learning task into dreams is related to memory...
Journal of Sleep Research
January 29, 2019
Annika Gieselmann, Malik Ait Aoudia, Michelle Carr et al.
192 citations
This consensus paper provides an overview of the state of the art in research on the aetiology and treatment of nightmare disorder and outlines further perspectives on these issues. It presents a definition of nightmares and nightmare disorder followed by epidemiological findings, and then explains existing models of nightmare aetiology in traumatized and non-traumatized individuals. Chronic...
European Journal of Psychotraumatology
2019
Robert-Jacek Gorzka, Katja Rebling, Helge Höllmer et al.
Background: Nightmares are a widespread phenomenon. In comparison to the general population, they occur in mentally ill and especially in traumatized individuals with an increased frequency. Despite the high prevalence, there is no short questionnaire in the German language that is able to characterize nightmares, to differentiate between different nightmare types and to assess their impact on...
Sleep science (Sao Paulo, Brazil)
2019
Michael Schredl, Anja S Goeritz
The diagnosis of a nightmare disorder is based on clinically significant distress caused by the nightmares, e.g., sleep or mood disturbances. In order to understand nightmare etiology better empirical research should focus on studying factors that affect nightmare distress in addition to nightmare frequency. Overall, 2492 persons (1437 woman, 1055 men) completed the online survey. Nightmare...
November 1, 2018
Annabelle Neuhäusler, Michael Schredl, Anja S. Göritz
A variety of induction techniques have been proposed to increase lucid dream frequency. An online survey was performed asking about knowledge of lucid dreaming and lucid dream induction techniques. The initial sample size was N=1380 with a subsample of N=716 who were asked questions concerning lucid dream induction techniques. The findings indicate that one quarter of all participants had heard...
Imagination, Cognition and Personality
September 1, 2018
Michael Schredl, Alina Noveski
Most studies looking into the relationship between lucid dream frequency and personality were based on questionnaire measures of lucid dream frequency. Thus, the aim was to investigate the effect of keeping a dream diary on lucid dream frequency and the correlates of the frequency of lucid dreams in the diary with the Big Five personality factors. The study included 1,612 dreams reported by 425...
Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT)
June 10, 2018
Gotthard G. Tribl, Franziska Beuerle, Mateus C. Trindade et al.
1 citation
The continuity hypothesis states that waking life experiences, e.g., personal concerns and cultural environment, are reflected in dreams. The present study’s goal was to compare written dream reports from Brazilian and German samples. Overall, 97 Brazilian participants were included; two German samples from previous studies (N=89 and N=4197) were selected for comparison. The Brazilian...
OPUS
June 7, 2018
Celina Schadow, Michael Schredl, Janina Rieger et al.
20 citations
Lucid dreams are dreams that involve awareness of dreaming while dreaming. As lucid dreaming is accompanied by heightened cortical activation, e.g., in the prefrontal cortex, it was speculated whether lucid dreaming interferes with the restorative function of sleep. Two cross-sectional studies have found inhomogeneous results regarding the relationship between lucid dream frequency and...
Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine
March 15, 2018
Michael Schredl, Anja S. Göritz
Even though the common diagnostic criteria (ICSD-3, DSM-5) acknowledge that nightmares do not only contain anxiety/fear (definition of the ICD-10) but also other emotions such as grief, disgust, and anger, the definition of a nightmare still focuses on threats to survival, security, or physical integrity. However, empirical studies on nightmare content in larger samples are scarce. The current...
Journal of Sports Sciences
December 1, 2017
Melanie Schädlich, Daniel Erlacher, Michael Schredl
In a lucid dream, the dreamer is aware of the dream state and can deliberately practice motor skills. Two field studies indicated that lucid dream practice can improve waking performance in simple motor tasks. The present pilot study investigated the effect of lucid dream practice in a controlled sleep laboratory setting, using a pre-post design with dart throwing in the evening and morning....
European Archives of Psychiatry and Clinical Neuroscience
February 1, 2017
Michael Schredl, J Malte Bumb, Barbara Alm et al.
Nightmare frequency in adult ADHD patients has not yet been studied systematically. In a sample of 65 patients, it could be shown that nightmare frequency was elevated in ADHD patients compared to a sample representative for Germany. Frequent nightmares (once a week or more often) were reported by 4.62 % of the patients and 1.77 % of the controls. This increase was neither explained by the...
BMC Pregnancy and Childbirth
November 9, 2016
Michael Schredl, Maria Gilles, Isabell Wolf et al.
Pregnancy-related dreams are often found in pregnant women but also the number of negatively toned dreams seems to be increased in this challenging phase of a woman's life. Nightmare frequency and subjectively experienced stress was elicited via questionnaires. The mothers-to-be were approached during their application visit about 4-8 weeks prior to delivery in three obstetric hospitals. The...
Imagination, Cognition and Personality
September 1, 2016
Michael Schredl, Josie Henley-Einion, Mark Blagrove
Although dreams are very private experiences, they are often shared with others. The findings of the present study ( N = 1,375) indicate that sharing dreams is indeed very common and that dream sharing frequency is related to gender (only in adolescents, with girls sharing dreams more often than boys), extraversion, dream recall frequency, and nightmare frequency. Future studies should study...
Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine
July 15, 2016
Michael Schredl, Lara Dehmlow, Judith Schmitt
Despite the considerable prevalence of the nightmare disorder and its burden on the patient, nightmares are underdiagnosed and undertreated, even in sleep centers. A total of 1,125 patients in a sleep center undergoing routine diagnostic procedures for their sleep disorders completed a questionnaire about nightmares. About 20% of the sample indicated an interest in more information about...
Current Psychiatry Reports
February 1, 2016
Michael Schredl
Although the relationship between dreaming and psychopathology has been studied quite extensively, research on dreaming in patients with personality disorders has been very scarce. In patients with borderline personality disorder, negatively toned dreams and heightened nightmare frequency have been found-characteristics not determined by co-morbid depression or posttraumatic stress disorder....
Behavioural Neurology
2016
Gotthard G. Tribl, Mateus C. Trindade, Michael Schredl et al.
8 citations
Objective. Violent dream content and its acting out during rapid eye movement sleep are considered distinctive for rapid eye movement sleep behaviour disorder (RBD). This study reports first quantitative data on dreaming in a cohort of patients with treated Wilson's disease (WD) and in patients with WD with RBD. Methods. Retrospective questionnaires on different dimensions of dreaming and a...
ORCA Online Research @Cardiff
2016
Michael Schredl, Josie Henley, Mark Blagrove
7 citations
Research that has focused on the relationship between the Big Five personality dimensions and lucid dreaming frequency has been restricted to student samples. The present study included adolescents and adults (N = 1375). i.e., the sample included a large range of ages. Lucid dreaming was more strongly related to openness to experiences compared to previous findings. The small but significant...