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Michael R Nadorff

25 papers in the library · 518 citations · publishing 2009-2026

Papers

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Lucid Dreaming: Not Just Awareness, but Agency.

Journal of Sleep Research April 1, 2026 Severin Ableidinger, Luigi De Gennaro, Sérgio Mota-Rolim et al.

During lucid dreaming (LD), dreamers are aware that they are dreaming and may be able to influence the oneiric content. There has been recent debate about the relative importance of the ability to influence the dream and having agency over the pure awareness of dreaming. To underline this, we examined the associations of lucid dreams without agency (LD-Ag) and lucid dreams with agency (LD + Ag)...

Prevalence Rates of Frequent Dream Recall and Nightmares by Age, Gender and Sleep Duration in 16 Countries.

Journal of Sleep Research February 1, 2026 Courtney J Bolstad, Bjørn Bjorvatn, Ngan Yin Chan et al.

The present study aimed to describe the prevalence rates of frequent (i.e., at least weekly) dream recall and nightmares with consideration for differences in age, gender and sleep duration in 16 countries using equivalent assessment methods. The study sample included 15,854 participants (69.9% women) aged 18-99 years (M = 42.39, SD = 16.43) collected by the International COVID-19 Sleep Study...

Treating narcolepsy-related nightmares with cognitive behavioural therapy and targeted lucidity reactivation: A pilot study.

Journal of Sleep Research June 1, 2025 Jennifer M Mundt, Kristi E. Pruiksma, Karen R Konkoly et al. 7 citations

Nightmares are a common symptom in narcolepsy that has not been targeted in prior clinical trials. This study investigated the efficacy of Cognitive Behavioural Therapy for Nightmares (CBT-N), adapted for narcolepsy, in a small group of adults. Given the high prevalence of lucid dreaming in narcolepsy, we added a promising adjuvant component, targeted lucidity reactivation (TLR), a procedure...

DOI: 10.1111/jsr.14384 (opens in new tab) Full text (opens in new tab) Lucid dreaming Hypnagogic hallucinations Hypnopompic hallucinations Imagery rehearsal therapy +2

An Expert Consensus Statement for Implementing Cognitive Behavioral Therapy for Nightmares in Adults

Behavioral Sleep Medicine January 15, 2025 Kristi E. Pruiksma, Katherine E Miller, Joanne L. Davis et al. 16 citations

OBJECTIVES: Research supports cognitive behavioral therapies for nightmares (CBT-N) in adults. However, the nuances of implementation and unstandardized nomenclature for treatment components has created confusion in the field. To provide clarification, an expert consensus panel convened to review treatment manual components and to develop guidelines for the standardized implementation and...

DOI: 10.1080/15402002.2024.2437634 (opens in new tab) Statement logic Cognition Cognitive behavioral therapy Medline +1

Nightmare frequency is a risk factor for suicidal ideation during the COVID-19 pandemic.

Journal of Sleep Research October 1, 2024 Courtney J Bolstad, Brigitte Holzinger, Serena Scarpelli et al.

The association between nightmare frequency (NMF) and suicidal ideation (SI) is well known, yet the impact of the COVID-19 pandemic on this relation is inconsistent. This study aimed to investigate changes in NMF, SI, and their association during the COVID-19 pandemic. Data were collected in 16 countries using a harmonised questionnaire. The sample included 9328 individuals (4848 women; age...

0927 Shining Light on Nightmare Treatment: Expert Panel Recommendations for Cognitive Behavioral Therapy for Nightmares

Sleep April 20, 2024 Kristi E. Pruiksma, Katherine E Miller, Joanne L. Davis et al.

Few providers are trained to deliver Cognitive Behavioral Therapy for Nightmares (CBT-N) despite the impact of nightmares on physical and mental health. Reduced access to treatment is partially due to limited training opportunities. Web-based training resources are valuable because they are easily accessible, are cost-efficient, and can be reviewed by providers as needed. This presentation...

Nightmare Disorder.

Sleep Medicine Clinics March 1, 2024 Victoria R Garriques, Deepali M Dhruve, Michael R Nadorff

This article presents a comprehensive review of nightmare disorder, covering diagnosis, treatment approaches, guidelines, and considerations. It begins with an introduction, defining the disorder and addressing its prevalence and psychosocial implications. The article explores assessment tools for diagnosis and then delves into psychological and pharmacologic treatment modalities, examining...

DOI: 10.1016/j.jsmc.2023.10.011 (opens in new tab) Full text (opens in new tab) Dream Nightmare disorder Nightmares Parasomnia +3

Factor Analysis and Validation of the Disturbing Dream and Nightmare Severity Index in an Inpatient Sample

Behavioral Sleep Medicine February 25, 2024 Katrina A Rufino, Courtney J Bolstad, Courtney B. Worley et al.

ABSTRACT Study Objectives The Disturbing Dream and Nightmare Severity Index (DDNSI) has been used widely in research and clinical practice without psychometric evidence supporting its use in clinical samples. The present study aimed to explore and confirm the factor structure of the DDNSI in an inpatient sample. We also sought to test the measure’s construct validity. Methods Two samples of...

Dream-enactment behaviours during the COVID-19 pandemic: an international COVID-19 sleep study.

Journal of Sleep Research February 2023 Yaping Liu, Eemil Partinen, Ngan Yin Chan et al.

There has been increasing concern about the long-term impact of coronavirus disease 2019 (COVID-19) as evidenced by anecdotal case reports of acute-onset parkinsonism and the polysomnographic feature of increased rapid eye movement sleep electromyographic activity. This study aimed to determine the prevalence and correlates of dream-enactment behaviours, a hallmark of rapid eye movement sleep...

DOI: 10.1111/jsr.13613 (opens in new tab) Full text (opens in new tab) Dream-enactment behaviour Neurodegeneration Prevalence

Has the COVID-19 Pandemic Traumatized Us Collectively? The Impact of the COVID-19 Pandemic on Mental Health and Sleep Factors via Traumatization: A Multinational Survey

Nature and Science of Sleep August 1, 2022 Brigitte Holzinger, Franziska Nierwetberg, Frances Chung et al. 16 citations

Purpose: The COVID-19 pandemic affects mental health and sleep, resulting in frequent nightmares. Therefore, identifying factors associated with nightmare frequency is important, as it can indicate mental health issues. The study aimed to investigate increases in nightmare frequency comparing the pre-pandemic and pandemic period, and identify its risk factors. Further, the mediating role of...

DOI: 10.2147/nss.s368147 (opens in new tab) Nightmare Mental health Pandemic Logistic regression +2

Nightmares in People with COVID-19: Did Coronavirus Infect Our Dreams?

Nature and Science of Sleep 2022 Serena Scarpelli, Michael R Nadorff, Bjørn Bjorvatn et al.

A growing number of studies have demonstrated that the coronavirus disease-19 (COVID-19) pandemic has severely affected sleep and dream activity in healthy people. To date, no investigation has examined dream activity specifically in COVID-19 patients. As part of the International COVID-19 Sleep Study (ICOSS), we compared 544 COVID-19 participants with 544 matched-controls. A within-subjects...

The impact of imagery rehearsal therapy on dream enactment in a patient with REM-sleep behavior disorder: A case study.

Dreaming September 1, 2021 Christina Pierpaoli-Parker, Courtney J Bolstad, E. Szkody et al.

Imagery rehearsal therapy (IRT) is an evidence-based treatment for nightmare disorder (ND), and numerous studies have demonstrated its ef fi cacy in reducing the frequency and severity of nightmares. ND and REM sleep behavior disorder (RBD) co-occur, yet the impact of successful treatment of nightmares on dream enactment in RBD has not been studied. In this case study, we present the treatment...

Epidemiology of disturbing dreams in a diverse US sample.

Sleep Medicine April 29, 2021 Courtney B. Worley, Courtney J Bolstad, Michael R Nadorff

Study objectives: Disturbing dreams are a common complaint among trauma survivors, but little epidemiological research exists to document the frequency in the general population. In addition, information about their occurrence in diverse adults is lacking. Methods: Using the Collaborative Psychiatric Epidemiology Surveys we had the unique opportunity to examine disturbing dreams in a diverse...

How our Dreams Changed During the COVID-19 Pandemic: Effects and Correlates of Dream Recall Frequency - a Multinational Study on 19,355 Adults.

Nature and Science of Sleep 2021 Eirin Fränkl, Serena Scarpelli, Michael R Nadorff et al.

Many have reported odd dreams during the pandemic. Given that dreams are associated with mental health, understanding these changes could provide crucial information about wellbeing during the pandemic. This study explored associations between COVID-19 and dream recall frequency (DRF), and related social, health, and mental health factors. We conducted a cross-sectional web survey of 19,355...

DOI: 10.2147/nss.s324142 (opens in new tab) Full text (opens in new tab) Collective threat Mental health Parasomnia Sleep disorder

1104 Increasing Accessibility of Nightmare Treatment Via Mobile Health

May 27, 2020 K. Speed, Michael R Nadorff, Todd M Bishop et al.

Nightmares have been tied to a myriad of adverse mental health outcomes and are known to persist after treatment of other concerns such as posttraumatic stress, depression, and anxiety. When reaching clinical levels, nightmare disorder is known to effect 2-6% of the general population, Although many treatments exist for nightmare disorder and posttraumatic nightmares, Imagery Rehearsal Therapy...

Aetiology and treatment of nightmare disorder: State of the art and future perspectives

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...

DOI: 10.1111/jsr.12820 (opens in new tab) Nightmare Distress Psychological intervention Psychotherapist +2

Treatment of Nightmares in Psychiatric Inpatients With Imagery Rehearsal Therapy: An Open Trial and Case Series.

Behavioral Sleep Medicine 2019 Thomas E Ellis, Katrina A Rufino, Michael R Nadorff

Objectives: This study sought to assess the utility of Imagery Rehearsal Therapy (IRT) for nightmares in an inpatient psychiatric setting. Although IRT enjoys a substantial evidence base for efficacy in various populations, data with psychiatric inpatients are lacking. Participants: Participants were 20 adult psychiatric inpatients (11 male, 9 female; mean age=43.4), in an extended stay...

Differentiating Single and Multiple Suicide Attempters: What Nightmares Can Tell Us That Other Predictors Cannot.

Journal of Clinical Sleep Medicine May 15, 2018 Katrina J Speed, Christopher W Drapeau, Michael R Nadorff

Study objectives: Although nightmares have been associated with suicidal behavior beyond well-known risk factors, the association between nightmares and multiple suicide attempts remains largely unexplored. This study addressed this gap in the literature by examining whether nightmares differentiated between individuals who reported single versus multiple suicide attempts. The individual...

Sleep disorder prevalence in at-risk adolescents and potential effects of nightmare triad syndrome.

International journal of adolescent medicine and health February 17, 2018 Natalia D McIver, Barry Krakow, Jessica Krakow et al.

Objective At-risk high school students, those considered to have a higher probability for academic failure or dropping out, were assessed for various sleep disorders. Effects were compared between students with and without the nightmare triad syndrome (NTS+), the sleep disorders' cluster of frequent nightmares, insomnia disorder and suspected sleep-disordered breathing (SDB). Methods Data were...

Unpacking Sleep and Suicide in Older Adults in a Combined Online Sample.

Journal of Clinical Sleep Medicine December 15, 2015 Shea Golding, Michael R Nadorff, E Samuel Winer et al.

Objective: Duration of insomnia symptoms and nightmares are related to suicidal risk in young adults independent of current symptoms of insomnia, nightmares, anxiety, depression, and PTSD. However, this relation has yet to be examined among older adults, despite older adults being at higher risk of suicidal behavior. Further, the current study aims to replicate previous research among younger...

DOI: 10.5664/jcsm.5270 (opens in new tab) Full text (opens in new tab) Humans Risk assessment Risk factors Dreams +9

Nightmares: Under-Reported, Undetected, and Therefore Untreated.

Journal of Clinical Sleep Medicine July 15, 2015 Michael R Nadorff, Danielle K Nadorff, Anne Germain

Nightmares are a robust and modifiable predictor of increased suicidality and poor psychiatric outcomes, yet nightmare screening and treatment remain rare, even in sleep centers. This paper aims to examine what proportion of nightmare sufferers have discussed nightmares with a healthcare provider, as well as possible explanations for low rates of nightmare complaints. The present study utilized...

DOI: 10.5664/jcsm.4850 (opens in new tab) Full text (opens in new tab) Nightmare disorder Nightmare screening Nightmare treatment Underreporting

Pharmacological and non-pharmacological treatments for nightmare disorder.

International Review of Psychiatry April 1, 2014 Michael R Nadorff, Karen K Lambdin, Anne Germain

Interest in the treatment of nightmares has greatly increased over the last several years as research has demonstrated the clinical significance of nightmare disorder. This paper provides an overview of nightmare disorder, its clinical relevance, and the leading treatments that are available. In particular, the paper defines nightmare disorder and then summarize the recent literature examining...

Insomnia symptoms, nightmares, and suicide risk: duration of sleep disturbance matters.

Suicide & life-threatening behavior December 28, 2012 Michael R Nadorff, Sarra Nazem, Amy Fiske

Duration of insomnia symptoms or nightmares was investigated to see if it was related to suicide risk independent of current insomnia symptoms, nightmares, anxiety symptoms, depressive symptoms, and posttraumatic symptoms. The cross-sectional study involved analyses of survey responses from undergraduate students who endorsed either insomnia symptoms (n = 660) or nightmares (n = 312). Both...

DOI: 10.1111/sltb.12003 (opens in new tab) Full text (opens in new tab) Humans Risk assessment Cross-sectional studies Suicide +7

Insomnia Symptoms, Nightmares, and Suicidal Ideation in a College Student Sample

Sleep 2011 Michael R Nadorff, Sarra Nazem, Amy Fiske 287 citations

STUDY OBJECTIVES: The purpose of this study was to investigate whether insomnia symptoms and nightmares are related to suicidal ideation independent of one another and independent of the symptoms of anxiety, depression, and posttraumatic stress disorder (PTSD). DESIGN: The study consisted of questionnaires examining insomnia symptoms and nightmares, and symptoms of depression, anxiety, and...

Insomnia symptoms, nightmares and suicidal ideation in a university sample

2009 Michael R Nadorff

Previous research has demonstrated a link between insomnia symptoms, nightmares, and suicidal ideation. The purpose of this study was to investigate whether insomnia symptoms and nightmares were related to suicidal ideation independent of each other. Further, the study aimed to determine whether suicidal ideation and nightmares were related with suicidal ideation independent of the symptoms of...