Dream Characteristics Research Articles

Dream Content in a Representative German Sample: Gender Differences and the Effects of other Socio-Demographic Variables

The present study investigated the effects of socio-demographic variables on dream content in a representative sample. The analyses of 380 most recent dreams showed that almost none of the socio-demographic variables like age, gender, marital status, education, income, nor town (or city) of residence size was significantly related to general dream characteristics like dream length, bizarreness, and intensity of dream emotions, thus indicating that dreaming is a universal phenomenon shared by all humans and is experienced in similar ways. On the other hand, dream content—in contrast to the general dream characteristics—is determined by waking-life experiences. This is clearly shown by the gender differences found in the present study: more work-related themes and physical aggression in men's dreams. In order to generalize these findings, it will be necessary to apply other dream collection methods like dream diary or laboratory awakenings in large, representative samples in order to obtain and analyze the dream reports of persons who do not often recall their dreams and who are not able to report their most recent dream to an interviewer.

Dream Lab: An experiential pedagogic approach to dream theories and characteristics.

Dream Lab: An experiential pedagogic approach to dream theories and characteristics.

Supplemental Material for Dream Lab: An Experiential Pedagogic Approach to Dream Theories and Characteristics

Supplemental Material for Dream Lab: An Experiential Pedagogic Approach to Dream Theories and Characteristics

Retrospective Reports of Dream Characteristics and Preferences for Organic vs Junk Foods

The authors investigated correlations between retrospective dream characteristics, food preferences, and eating attitudes. Graduate students (7 men, 42 women) at Santa Clara University were administered the MEGA food scale and the KJP Dream Inventory. High intake of organic food was positively correlated with reports of multiple dream factors. Conversely, high scores on preferences for fast food, potato chips, and carbohydrates were negatively correlated with several factors. Findings are discussed in terms of the hypothesis that certain foods may influence dreaming.

Effect of individual psychological and biosocial characteristics of the subject's dreams

Effect of individual psychological and biosocial characteristics of the subject's dreams

Phenomenology of dreams in Parkinson's disease

Rapid eye movement sleep behavior disorder (RBD) occurs in approximately one third of patients with Parkinson's disease (PD) and is associated with a loss of muscle atonia during REM sleep and aggressive dream content. We examined the dream characteristics of PD patients to determine whether dream content differed between patients with RBD and without RBD, men and women with RBD, and men and women with PD. One hundred-twenty patients with a diagnosis of idiopathic PD were consecutively recruited from a movement disorders clinic and were assessed for RBD using clinical diagnostic criteria of the International Classification of Sleep Disorders Revised (2001). Verbatim dream content was obtained from each patient and categorized into dream themes that were coded into nominal categories. Fisher's exact tests determined whether particular dreams were correlated with RBD versus non-RBD, men and women with RBD, and men and women with PD. RBD patients had a higher percentage of violent dreams compared to non-RBD patients. There were no significant sex differences in the dream content of RBD patients. Men with PD had more aggressive dreams compared to females with PD. Aggressive dream content was characteristic of RBD patients and sex differences exist in the dream content of the PD population.

Circadian and ultradian influences on dreaming: A dual rhythm model

The dual rhythm model of dreaming states that, under high sensory thresholds, heightened general cortical activation common to both REM/NREM and circadian-driven activation cycles sums to produce the main characteristics of dreaming. In addition, the unique pattern of regional brain activation characteristic of REM sleep amplifies the emotional intensity of the dream. Subjects were awakened from REM and NREM sleep once near the nadir of the core body temperature rhythm, where circadian-driven cortical activation was assumed to be low, and again in the late morning, where this activation was presumed to be high. As predicted, changes in the central characteristics of dream reports mirrored REM/NREM and circadian-driven fluctuations in general activation, while at the same time, the regional activation pattern unique to REM sleep amplified dream emotionality selectively in REM reports.

A Parallel Group Placebo Controlled Study of Prazosin for Trauma Nightmares and Sleep Disturbance in Combat Veterans with Post-Traumatic Stress Disorder

Excessive brain responsiveness to norepinephrine appears to contribute to post-traumatic stress disorder (PTSD), particularly at night. Prazosin, a brain active alpha-1 adrenergic receptor antagonist, significantly reduced trauma nightmares and sleep disturbance in 10 Vietnam War combat veterans in a previous placebo-controlled crossover study. The current parallel group trial in a larger sample of veterans evaluated prazosin effects on trauma nightmares, sleep quality, global clinical status, dream characteristics, and comorbid depression. Forty veterans (mean age 56 +/- 9) with chronic PTSD and distressing trauma nightmares and sleep disturbance were randomized to evening prazosin (13.3 +/- 3 mg/day) or placebo for 8 weeks. In the evaluable sample (n = 34), primary outcome measures demonstrated that prazosin was significantly superior to placebo for reducing trauma nightmares and improving sleep quality and global clinical status with large effect sizes. Prazosin shifted dream characteristics from those typical of trauma-related nightmares toward those typical of normal dreams. Blood pressure changes from baseline to end study did not differ significantly between prazosin and placebo. Prazosin is an effective and well-tolerated treatment for trauma nightmares, sleep disturbance and global clinical status in veterans with chronic PTSD.

Aggressive dream content without daytime aggressiveness in REM sleep behavior disorder

REM sleep behavior disorder (RBD) is characterized by vigorous sleep motor activity associated with dream mentation. Patients with RBD frequently report action-filled and violent dreams. To systematically assess dream characteristics and daytime aggressiveness in patients with RBD and controls. Forty-nine patients with polysomnographic-confirmed RBD diagnosis and 71 age- and sex-matched controls were asked to recall the most recent dreams and to complete the Aggression Questionnaire (AQ). Forty-one patients with RBD (81.6%; 36 men, 5 women; mean age: 67.5 +/- 7.5 years) and 35 controls (49.3%; 30 men, 5 women; mean age: 69.1 +/- 5.9 years) were able to remember their dreams and a total of 98 (RBD) and 69 (controls) dreams were collected in the two groups. Verbatim dream descriptions were scored and analyzed according to the Hall and Van De Castle method. Patients with RBD showed a higher percentage of dream with at least one aggressive episode (DWA) than controls (66% vs 15%; p < 0.00001), a higher aggression/friendliness interaction ratio (86% vs 44%; p < 0.0001), and a greater frequency of animal characters (19% vs 4%; p = 0.0001). In contrast to controls, no patient with RBD had dreams with elements of sexuality (0% vs 9%; p < 0.0001). The two groups did not differ in total AQ scores, except for a lower score on the physical aggressiveness subscale in patients with RBD compared to control subjects (16.5 +/- 6.4 vs 20.4 +/- 8.3; p = 0.034). No correlation was observed between dream aggressiveness and age, duration, or frequency of RBD symptoms. Dreams in patients with REM sleep behavior disorder were characterized by an elevated proportion of aggressive contents, despite normal levels of daytime aggressiveness. Dreams with aggressiveness and the known excessive phasic muscle activity during REM sleep may be related to the hyperactivity of a common neuronal generator.

Dreams of Truck Drivers: A Test of the Continuity Hypothesis of Dreaming

Empirical studies largely support the continuity hypothesis of dreaming. The present study investigated the frequency and emotional tone of dreams of truck drivers. On the one hand, the findings of the present study partly support the continuity regarding the time spent with driving/being in the truck and driving dreams and, on the other hand, a close relationship was found between daytime mood (feelings of stress, job satisfaction) and dream emotions, i.e., different dream characteristics were affected by different aspects of daytime activity. The results, thus, indicate that it is necessary to define very clearly how this continuity is to be conceptualized. The approach of formulating a mathematical model (cf. [1]) should be adopted in future studies in order to specify the factors and their magnitude in the relationship between waking and dreaming.

Chronobiological features of dream production.

A review of the scientific literature clarifies several chronobiological features of dreaming. The literature supports the conclusions that dreaming 'intensity' and, to a lesser extent dream-like quality, is modulated by (1) a sinusoidal, 90-min ultradian oscillation, (2) a 'switch-like' circadian oscillation, (3) a 12-h circasemidian rhythm, and (4) a 28-day circatrigintan rhythm (for women). Further, access to dream memory sources appears to be modulated by (5) a 7-day circaseptan rhythm. Further study of these rhythmic influences on dreaming may help to explain diverse and often contradictory findings in the dream research literature, to clarify relationships between dreaming and waking cognitive processes, to explain relationships between disturbed phase relationships and dream disturbances and to shed new light on the problems of dreaming's functions and biological markers. Further chronobiological studies of dreaming will likely enable the development of theoretical models that explain how interactions between and within major levels of oscillation determine the variable characteristics of dreaming.

Content Analysis of German Students' Dreams: Comparison to American Findings.

Studies have demonstrated that general dream characteristics, such as gender ratio and familiarity of dream characters, frequency and type of social interactions and settings, and gender differences (e.g., heightened physical aggression in men's dreams), are very stable over time and across different populations. The present study included 537 dreams of 106 women and 39 men (German students). The results confirmed earlier findings regarding the stability of general dream characteristics and gender differences. Only the gender difference regarding the gender ratio of dream characters has not been replicated; this finding might be explained by the relationship status (single vs. stable partnership) of the dreamers. The comparison of large dream samples may shed light on the similarities and differences between the inner worlds of people of different countries and cultures.

The sanctification of dreams: Prevalence and implications.

Many scientists and practitioners have debated about the function of dreams. Though some researchers have described dreams as purposeless random neuronal firings, others have suggested that dreams serve an adaptive function with certain dream characteristics having positive implications. Drawing on other studies of sanctification, this study examines whether imbuing a dream with qualities of the sacred relates to beneficial outcomes. Examining a college student sample of 168, it was found that the more sacred the dream was perceived, the more beneficial the outcome reported from a stressful life event which related to the dream. These outcomes include less negative affect and more positive affect, psychological and spiritual growth. Sanctification of dreams predicted these outcome variables over and above other religious measures as well as dream measures. The implications of these findings are discussed.

What do patients with irritable bowel syndrome dream about? A comparison with inflammatory bowel disease

Background. It is a common experience for people to dream of events about which they are either anxious or concerned. We therefore hypothesised that the dreams of patients with irritable bowel syndrome may reflect their worries about their problem especially as hospital out-patients with this disorder tend to exhibit some anxiety. In addition, dreaming about, for instance bowels, in patients with irritable bowel syndrome in excess of that observed in other gastrointestinal disorders may be of importance. Aim. To establish whether patients with irritable bowel syndrome dream about bowel-related issues more than controls or patients with inflammatory bowel disease. Patients and Methods. A total of 57 patients with irritable bowel syndrome and 57 patients with inflammatory bowel disease were compared with 60 healthy controls. All subjects completed a structured questionnaire concerning sleeping habits and dream characteristics as well as an assessment of anxiety and depression. Results. There were no differences in the sleeping habits between any of the groups. However, significantly more patients with irritable bowel syndrome and inflammatory bowel disease dreamt about their bowels (22% inflammatory bowel disease patients, 18% irritable bowel syndrome patients vs 3% of controls, p<0.05 inflammatory bowel disease and irritable bowel syndrome vs controls) and soiling themselves (16% of inflammatory bowel disease patients, 14% of irritable bowel syndrome patients vs 2% of controls; p<0.05 inflammatory bowel disease and irritable bowel syndrome vs controls) than controls. Conclusion. Chronic gastrointestinal disorders, of both a functional and organic nature, may influence the nature of dreams. In those patients who dream about their symptoms, it would be interesting to know whether this affects the course of their disease, either positively or negatively, in any way.

Dream Characteristics of Stock Brokers after a Major Market Downturn

Dream characteristics of 28 stock brokers during the second worst weekly performance of the Dow Jones Industrial Average in the last 11 yr. were measured using the KJP Dream Inventory. Additional measures of powerlessness and stress were administered as well. Significant correlations appeared between the amount of stress brokers reported during this week and the appearance of recurring nightmares (.59), feelings of being chased (.42), and dreams’ pleasantness (–.64). The brokers’ clients’ investment performance was correlated significantly with changes in the brokers’ experience of traumatic dreams (–.51) and dreams of falling (–.43). Further, as the brokers’ own personal investments deteriorated overall, dreaming increased (.48), suggesting compensatory mechanisms. Results were discussed in terms of the relationship between onset of acute traumatic states and dreaming.

Dream characteristics of stock brokers after a major market downturn.

Dream characteristics of 28 stock brokers during the second worst weekly performance of the Dow Jones Industrial Average in the last 11 yr. were measured using the KJP Dream Inventory. Additional measures of powerlessness and stress were administered as well. Significant correlations appeared between the amount of stress brokers reported during this week and the appearance of recurring nightmares (.59), feelings of being chased (.42), and dreams' pleasantness (-.64). The brokers' clients' investment performance was correlated significantly with changes in the brokers' experience of traumatic dreams (-.57) and dreams of falling (-.43). Further, as the brokers' own personal investments deteriorated overall, dreaming increased (.48), suggesting compensatory mechanisms. Results were discussed in terms of the relationship between onset of acute traumatic states and dreaming.

Reliability in Dream Research: A Methodological Note

The coefficients of internal consistency and retest reliability had been rarely investigated within the methodology of dream content analysis. Analyzing a dream series of elderly, healthy persons obtained from weekly telephone interviews, the internal consistency of a series of 20 dreams and retests after 4 or 22 weeks, respectively, had been computed. The findings indicate that dream recall and dream length are quite stable, but dream characteristics such as bizarreness and emotional tone underlie large intraindividual fluctuations. In order to obtain reliable measures for these variables which will be important for correlational studies, including waking-life trait measures, one has to obtain as many dreams as possible (about 20) in a very short time period. Further research is needed to extend the present findings to diary dreams and laboratory dreams.

SSRI treatment suppresses dream recall frequency but increases subjective dream intensity in normal subjects.

Clinical lore and a small number of published studies report that the selective serotonin reuptake inhibitors (SSRIs) intensify dreaming. This study examines the dream effects of paroxetine and fluvoxamine in order to both increase clinical knowledge of these agents and to test an important potential method for probing the relationship between REM sleep neurobiology and dreaming in humans. Fourteen normal, paid volunteers (4 males, 10 females; mean age 27.4 year, range 22--39) free of medical or neuropsychiatric symptoms as well as of psychotropic or sleep affecting drugs completed a 31-day home-based study consisting of: 7 days drug-free baseline; 19 days on either 100 mg fluvoxamine (7 Ss) or 20 mg paroxetine (7 Ss) in divided morning and evening doses; and 5 days acute discontinuation. Upon awakening, subjects wrote dream reports, self-scored specific emotions in their reports and rated seven general dream characteristics using 5-point Likert scales. Dream reports were independently scored for bizarreness, movement and number of visual nouns by three judges. REM sleep-related measures were obtained using the Nightcap ambulatory sleep monitor. Mean dream recall frequency decreased during treatment compared with baseline. Dream report length and judge-rated bizarreness were greater during acute discontinuation compared with both baseline and treatment and this effect was a result of the fluvoxamine-treated subjects. The subjective intensity of dreaming increased during both treatment and acute discontinuation compared with baseline. Propensity to enter REM sleep was decreased during treatment compared with baseline and acute discontinuation and the intensity of REM sleep increased during acute discontinuation compared with baseline and treatment. The decrease in dream frequency during SSRI treatment may reflect serotonergic REM suppression while the augmented report length and bizarreness during acute SSRI discontinuation may reflect cholinergic rebound from serotonergic suppression.

Predictors of outcome of dream interpretation sessions: Volunteer client characteristics, dream characteristics, and type of interpretation.

105 volunteer clients completed single sessions of dream interpretation using the Hill (1996) model, with half randomly assigned to waking life interpretation and the other half to parts of self interpretation in the insight stage of the Hill model. No differences were found between waking life and parts of self interpretations, suggesting that therapists can use either type of dream interpretation. Volunteer clients who had positive attitudes toward dreams and presented pleasant dreams had better session outcome; in addition, volunteer clients who had pleasant dreams gained more insight into their dreams. Results suggest that therapists doing single sessions of dream interpretation need to be cautious about working with dreams when volunteer clients have negative attitudes toward dreams and present unpleasant dreams.

Risk-taking, death anxiety, and dreaming.

Dream characteristics of 29 women from a graduate program were correlated with scores on the Sensation-Seeking and Death Anxiety scales. Significant positive correlations were obtained between Sensation Seeking and dream frequency (.38), meaningful dreams (.38), and Openness and depth of dreaming (.39) as well as between Thrill-seeking and dream frequency (.41) and meaningful dreams (.41). Death Anxiety scores positively related to the occurrence of nightmares (.37), representations of death in dreams (.55), and recurring nightmares (.38), but no support was found for a relationship between death anxiety and Sensation Seeking.