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Nightmares and night terrors represent two distinct types of sleep disturbances that differ in timing, characteristics, and the sleeper's recall of the event. Nightmares are vivid, disturbing dreams that usually awaken the sleeper from REM sleep, a stage of sleep where brain activity is high, and dreams are most frequent. Upon awakening, individuals often have detailed recollections of their nightmares, which can include themes of threats to survival, security, or self-esteem.
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The Distressing Dream Content Inventory: Development and Initial Validation in Acute Trauma Patients.

Anthony N Reffi1,2,3, Greg Mahr1,4, Lily Jankowiak1

  • 1Sleep Disorders and Research Center, Henry Ford Health, Detroit, Michigan, USA.

Journal of Sleep Research
|March 17, 2026
PubMed
Summary
This summary is machine-generated.

Distressing dreams after trauma may signal emotional processing difficulties. A new clinician-rated tool, the Distressing Dream Content Inventory, identifies negative dream content predicting posttraumatic stress disorder (PTSD) risk.

Keywords:
affective neuroscience theorydisturbing dreamsnightmare contentposttraumatic sleeppsychometricsscale developmentsleep disturbance

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Area of Science:

  • Psychology
  • Neuroscience
  • Clinical Research

Background:

  • Distressing dreams following trauma can indicate challenges in emotional processing.
  • Unsuccessful emotional processing in dreams may increase the risk of developing posttraumatic stress disorder (PTSD).
  • Existing measures do not specifically assess the emotional content of dreams post-trauma.

Purpose of the Study:

  • To develop and validate a clinician-rated inventory for assessing emotional dream content after trauma.
  • To identify specific emotions within dreams that correlate with trauma and PTSD risk.
  • To establish a tool for early identification of individuals at higher risk for PTSD.

Main Methods:

  • Development of 77 items targeting seven emotions (fear, anger, sadness, seeking, care, play, lust) in dreams.
  • Two independent raters scored 100 dreams using the developed items.
  • Validation in Study 2 using 42 trauma patients' dreams at 1 week (T1) and 1 month (T2) post-trauma.

Main Results:

  • An 18-item negative dream inventory (fear, anger, sadness) correlated with self-reported dream negativity and inversely with positivity.
  • Negative dreams were linked to interpersonal violence exposure and higher acute stress at T1.
  • Negative dreams at T1 prospectively predicted trauma-related nightmares and PTSD at T2.

Conclusions:

  • The Distressing Dream Content Inventory is a novel, clinician-rated tool for assessing negative emotional dream content post-trauma.
  • Negative dream content identified by the inventory is predictive of future PTSD risk.
  • This tool aids in the early identification of individuals requiring further assessment and intervention for PTSD.