Austrian Dream Behavior: Results of a Representative Population Survey

This study was based on a survey of a representative sample of 1000 Austrians who were questioned about their sleep and dream behavior. About two-thirds of the respondents reported that they generally recalled at least one dream per month. Dream recall frequency decreased with advancing age, but did not differ between men and women. Fifty-five percent of the respondents characterized the affective content of their dreams: 29% reported neutral, 20% positive, and 6% negative dreams. Four percent of the sample reported suffering from nightmares. These respondents more frequently reported snoring, interrupted sleep, daytime somnolence, anxiety and nervousness, depression, high dream recall, recurrent dreams, and dreaming in color. Twenty-six percent of the total sample reported that sometimes they realized during their dreams that they were dreaming. These respondents more frequently reported family problems, high dream recall, positive dream content, recurrent dreams, dreaming in color, and nightmares.     

Cognitive differences in dream content between Argentine males and females using quantitative content analysis.

This study asked the question, "Are there significant content differences between male and female dream reports obtained in seminars conducted in Argentina?" Each of the 100 female and 100 male participants contributed one recent dream report during dream seminars held in Argentina between 1990 and 1998. Dream reports were scored using Hall and Van de Castle's System of Content Analysis. Major findings revealed that Argentine males reported significantly more aggressions per character and a higher percentage of dreamers as the aggressor than reported by females. They also reported more dreams with at least one success than reported by females. In contrast, females scored significantly higher on both the Self-Negativity index and the Negative Emotions index compared to males. Although some findings were similar to past studies using American participants, others were unique to this study and may be attributable to the particular sample used, or may suggest actual underlying cultural patterns of contemporary Argentine men and women. Results are discussed in terms of Hall's continuity hypothesis and Domhoff's cognitive model of dreaming. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The relationship between video game play and threat simulation dreams.

Revonsuo proposes an evolutionary theory of dreaming in which dreams allow an individual to prepare for real world threats in the safety of the virtual setting of the dream world. Based upon previous work examining the dreams of video game players, it was hypothesized that high-end gamers would experience fewer threat simulation dreams because of frequent threat resolution rehearsal during game play. Subjects were asked to report a night before dream and fill out surveys regarding their gaming history, media use, and dream experiences. Using a factor analysis, support for the main hypothesis was found. Individuals with a history of game play experienced fewer threat severity variables in their dreams. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dream Recall Frequency and Dream Detail as Mediated by Personality, Behavior, and Attitude

Many studies investigated how personality, behavior, and attitude mediate dream recall, but few distinguish between measures of dream recall frequency: the number of dreams experienced in a specified time frame and dream detail: individual ratings of vividness or detailed content of dreams. This study compared undergraduates' (n = 173) self-reported dream recall frequency, and dream detail, with behaviors, attitude toward dreaming, and scores on scales of Extraversion/Introversion and Type A/B. Dream recall frequency and dream detail manifested different patterns of association in relation to behaviors, attitude and personality. Dream recall frequency was associated with the frequency of experiencing emotionally disturbing dreams and trying to interpret dreams, while detail of dreams was associated with positive attitude toward dreaming and Type B personality. Although males and females both held positive attitudes toward dreaming, females experienced more emotionally disturbing dreams and felt unable to control their dreams. Interactions between personality and gender emerged for behaviors associated with dreaming. Researchers are encouraged to differentiate between dream recall frequency and dream detail.     

Do we think dreams are in black and white due to memory problems?

The present study was designed to investigate whether memory processes play a role in why some persons say their dreams are black and white. The findings indicate that the percentages of black and white dreams are related negatively to color memory and dream recall frequency. When colors were recorded immediately after the dream was recorded, the percentage of black and white dream elements dropped to 2.7%. When participants were presented the option that dream colors might not be remembered, the percentage of explicit black and white dreams became very small, and the findings are thus in line with the continuity hypothesis of dreaming. Future studies might use extensive training of color memory and dream recall in order to investigate whether highly trained persons still have some dreams or dream elements that are in black and white. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Students' views on the role of dreams in human life.

The present study was an attempt to investigate the subjectively perceived role of dreams. It examined the private concepts of dreams and dreaming, attitude toward dreams, and the influence of dreams on behavior, which can manifest in sharing dreams with other people, trying to interpret one's own dreams, believing they have special meaning, or behaving according to the clues given by the dream. The sample consisted of 47 participants, students ages 19-20. A structured interview, individually administered, was used. The results indicate interesting relationships between analyzed variables and gender; they also show individual differences in both common notions about dreams and the way dreams can influence other kinds of behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dream Content and Personality: Thick vs. Thin Boundaries

Using dream diary procedures and statistically controlling for age and gender, the present study investigated the relationship between Hartmann's (1991) boundary concept and various aspects of dreaming. Results with a sample of young adults confirmed earlier findings that persons with thin boundaries recall dreams (including nightmares) more often, report dreams that are more negative and emotionally intense, regard their dreams more favorably (i.e., as more meaningful and creative), and dream more frequently of verbal interaction with others.     

Do the Blind Literally "See" in Their Dreams? A Critique of a Recent Claim That They Do.

This article provides a critique of a recent inaccurate claim by Bértolo et al (see record 2003-04658-011) that the congenitally blind literally "see" in their dreams, which flies in the face of findings that were established in 3 careful previous studies. It first shows how this claim arose through a blurring of the distinction between actual seeing through the visual system and imagery that preserves spatial and metric properties without specific reliance on the visual system. It then discusses the 3 mistaken reasons for this blurring. This correction is important beyond the specific issue of seeing in dreams because the original findings lend important support for a cognitive theory of dreaming by showing that the imagery necessary for dreaming develops between ages 4 and 7. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Sex dreams, wet dreams, and nocturnal emissions.

This study provides an overview of the frequencies and narrative features of sex and wet dreams and investigates the incestuous behavior in the manifest content of dreams. A questionnaire specially designed for capturing both quantitative and qualitative aspects of sex and wet dreams was administered to 58 male participants. More than 80% of participants had dreamed about having vaginal intercourse with a woman. Dreaming of sexual interactions other than vaginal intercourse—such as oral sex—was also common. Consistent with the hypothesis that latent sexual motives or some variation of sexuality that people may not be aware of during the daytime would emerge at night through dreaming, both homosexual and incestuous behaviors were observed in dreams. In addition, the finding indicates that sexual thoughts and motives can be represented by symbols in dreams, and dream impressions involving no erotic scenes are capable of eliciting nocturnal emissions. It seems that sex dreams, wet dreams, and nocturnal emissions without erotic imagery or dreaming can be distinguished from each other. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

A reply to Hobson (2005).

J. A. Hobson's (2005) commentary merely repeats his past theoretical assertions (see record 2005-02950-002). It asks questions that rest on the refuted hypothesis that real dreaming occurs only in REM sleep and that are already answered in the author's critique. Despite many studies, there is still no evidence that neurophysiological changes during REM are responsible for any unique formal features in dreams. As for the psychological consequences of the neuromodulatory environment during REM, there are no studies. Most important, Hobson overlooks a key point in regard to a new neurocognitive approach to dreams: The many parallels between dreaming and waking cognition raise the intriguing possibility that relatively small changes from waking to sleeping can account for the unique features of dreams, rendering his REM-based speculations irrelevant. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Age estimation, growth, maturity and distribution of the roundnose grenadier from the Rockall trough

This paper summarizes the history of commercial exploitation of roundnose grenadier Coryphaenoides rupestris in the North Atlantic. Length frequencies of C. rupestris in 1993, from 400 to 1200 m on the slopes of the Rockall trough indicate a reduction since the 1970s in the modal length of fish found at 700–1000 m. Ages ranged from 2 to 50 years for males and 2 to 60 years for females, with most between 10–38 years. Females attained a greater asymptotic pre-anus length ( L _∞=19.5 cm) than males ( L _∞=15.5 cm) and had a greater weight for a given age (male W _∞=761g, female W _∞=1132g). This species may have a protracted spawning period. Using pre-anus lengths, 50% of male fish were mature at 10 cm (ages 8–10) while 50% of female fish were mature at 12 cm (ages 9–11). At the greatest depths sampled the length frequency of fish was bimodal with a hiatus between 9 and 11 cm (ages 8–12). Highest catch rates occurred on the Donegal slope in September at a depth of 800–1000 m.     

55岁以下急性冠状动脉综合征的影响因素分析

目的:探究55岁以下急性冠状动脉综合征(Acute coronary syndrome,ACS)患者的影响因素。方法:选择2010年3月至2013年3月于我院就诊的180例55岁以下ACS患者为研究对象,按照其性别将其区分为男性组(101例)和女性组(79例)。收集和比较两组患者一般临床资料,血清血红蛋白(Hemoglobin,HGB)、甘油三酯(Triglyceride,TG)、胆固醇(Cholesterol,TC)、低密度脂蛋白胆固醇(Low density lipoprotein cholesterol,LDL-C)、高密度脂蛋白胆固醇(High density lipoprotein cholesterol,HDL-C)、血尿酸水平。对两组患者进行5年随访,对比两组患者心血管不良事件(Major adverse cardiovas-cular events,MACE)的发生率、死亡率及再发病率。结果:(1)女性组平均发病年龄高于男性组,女性组伴发高血压、糖尿病、脑卒中比率高于男性组,男性组吸烟史比率高于女性组(P<0.05),两组BMI、心血管病家族史对比差异无统计学意义(P>0.05);(2)女性组TC、TG、LDL-C、HDL-C水平均高于男性组(P<0.05),女性组血尿酸水平低于男性组(P<0.05);(3)对比5年预后,男性组MACE发生率为9.90%(10/101),女性组MACE发生率为11.39%(9/79),男性组死亡率为1.98%(2/101),女性组为1.27%(1/79),再发病率男性组为5.94%(6/101),女性组为6.33%(5/79),两组上述指标对比差异均无统计学意义(P>0.05)。结论:女性ACS患者发病年龄高于男性患者,糖尿病、高血压等病对女性患者影响更为明显,而吸烟则对男性影响更大,女性ACS患者血脂、血尿酸等指标异常程度甚于男性患者,但女性与男性患者远期预后相当。     

四川梅花鹿生命表和种群增长率的研究

1987年、1989—1991年四川梅花鹿产仔期,在四川省若尔盖县铁布自然保护区用耳缺法连续标记了111只(♂♂56,♀♀55)3～10日龄的四川梅花鹿幼仔,根据野外对这批标记仔鹿生长、繁殖、死亡的观察数据编绘出四川梅花鹿的生命表、存活曲线、死亡曲线、种群自然增长率和繁殖价。这批标记仔鹿中,雄鹿和雌鹿的最大寿命分别为14岁和15岁;初生仔鹿的雌雄性比为1：1,5～6岁时雌雄性比为3：1;雌鹿最早的产仔年龄为3～4岁,最晚产仔年龄为11～12岁;雄鹿最早在4～5岁时拥有雌鹿,10—11岁以后就都失去了曾占有的雌鹿群。雄鹿2 3岁时期望寿命最大为5.111,雌鹿1～2岁时期望寿命最大为6.148。雌鹿的存活曲线接近于Odum有关存活曲线的A型,雄鹿的存活曲线属B型。净生殖率、种群自然增长率和平均世代时间分别为1．228、0.031和7.015。雌鹿3—4岁时的繁殖价最高。     

Virtual reality training of lucid dreaming

Metacognitive reflections on one''s current state of mind are largely absent during dreaming. Lucid dreaming as the exception to this rule is a rare phenomenon; however, its occurrence can be facilitated through cognitive training. A central idea of respective training strategies is to regularly question one''s phenomenal experience: is the currently experienced world real, or just a dream? Here, we tested if such lucid dreaming training can be enhanced with dream-like virtual reality (VR): over the course of four weeks, volunteers underwent lucid dreaming training in VR scenarios comprising dream-like elements, classical lucid dreaming training or no training. We found that VR-assisted training led to significantly stronger increases in lucid dreaming compared to the no-training condition. Eye signal-verified lucid dreams during polysomnography supported behavioural results. We discuss the potential mechanisms underlying these findings, in particular the role of synthetic dream-like experiences, incorporation of VR content in dream imagery serving as memory cues, and extended dissociative effects of VR session on subsequent experiences that might amplify lucid dreaming training during wakefulness.This article is part of the theme issue ‘Offline perception: voluntary and spontaneous perceptual experiences without matching external stimulation''.     

Sex and age differences in juvenile social priorities in female philopatric,nondespotic blue monkeys

Juveniles should choose social partners on the basis of both current and future utility. Where one sex is philopatric, one expects members of that sex to develop greater and sex‐typical social integration with group‐mates over the juvenile period. Where a partner's position in a dominance hierarchy is not associated with services it can provide, one would not expect juveniles to choose partners based on rank, nor sex differences in rank‐based preferences. We tested these ideas on 39 wild juvenile (3.2–7.4 years) blue monkeys (Cercopithecus mitis stuhlmanni), cercopithecines with strict female philopatry and muted hierarchies. We made focal animal observations over 6 months, and computed observed:expected amounts of proximity time, approaches and grooming given to various social partners. Overall, our results agree with the hypothesis that juvenile blue monkeys target social partners strategically. Spatial proximity, approaches and active grooming showed similar patterns regarding juvenile social preferences. Females were far more sociable than males, groomed more partners, reciprocated grooming more frequently, and preferred—while males avoided—infants as partners. Older juveniles (5–7 years) spent more time than younger juveniles (3–4 years) near others, and older females were especially attracted to infants. Close kin, especially mothers and less consistently adult sisters, were attractive to both male and female juveniles, regardless of age. Both sexes also preferred same‐sex juveniles as social partners while avoiding opposite‐sex peers. Juveniles of both sexes and ages generally neither preferred nor avoided nonmaternal adult females, but all juveniles avoided adult males. Partner's rank had no consistent effect on juveniles' preference, as expected for a species in which dominance plays a weak role. Juveniles' social preferences likely reflect both future and current benefits, including having tolerant adult kin to protect them against predators and conspecifics, same‐sex play partners, and, for females, infants on which to practice mothering skills. Am. J. Primatol. 72:193–205, 2010. © 2009 Wiley‐Liss, Inc.     

Nightmare frequency as a function of age, gender, and September 11, 2001: Findings from an Internet questionnaire.

Retrospective estimates of nightmare frequency for a sample of 23,990 respondents to an Internet questionnaire (female: N = 19,367, mean age = 24.9 ± 10.14 years; male: N = 4,623; mean age = 25.5 ± 10.81) were evaluated as a function of age, gender, and pre- versus post-September 11, 2001. Female respondents reported more frequent monthly nightmares (4.44 ± 6.71) than did male respondents (3.39 ± 6.07), and this result was seen for all age strata younger than 60. Also, for female respondents, nightmare frequency increased from ages 10-19 to 20-39 then decreased monotonically to ages 50-59. For male respondents, nightmare frequency was stable from ages 10-19 to 30-39 then decreased to ages 50-59. An increase in nightmare frequency was observed post-September 11 only for male respondents-particularly for 10- to 29-year-olds. This increase was sustained 2 years later. These effects were maintained when dream recall was held constant. Results replicate, in a single sample, previously published gender and age effects and provide new evidence that the nightmares of males may be differentially sensitive to traumatic events for which victims and/or perpetrators are primarily male. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Assessment of Dental Age of Children Aged 3.5 to 16.9 Years Using Demirjian’s Method: A Meta-Analysis Based on 26 Studies

Background A method for assessing dental maturity in different populations was first developed in 1973 by Demirjian and has been widely used and accepted since then. While the accuracy for evaluating dental age using Demirjian’s method compared to children’s chronological age has been extensively studied in recent years, the results currently available remain controversial and ambiguous. Methods A literature search of PubMed, Embase, Web of Science, CNKI and CBM databases was conducted to identify all eligible studies published before July 12th, 2013. Weighted mean difference (WMD) with corresponding 95% confidence interval (95% CI) was used to evaluate the applicability of Demirjian’s method for estimating chronological age in children. Results: A meta-analysis was conducted on 26 studies with a total of 11,499 children (5,301 boys and 6,198 girls) aged 3.5 to 16.9 years. Overall, we found that Demirjian’s method overestimated dental age by 0.35 (4.2 months) and 0.39 (4.68 months) years in males and females, respectively. A subgroup analysis by age revealed that boys and girls between the ages of 5 to 14 were given a dental age estimate that was significantly more advanced than their chronological age. Differences between underestimated dental ages and actual chronological ages were lower for male and female 15- and 16-year-old subgroups, though a significant difference was found in the 16-year-old subgroup. Conclusions Demirjian’s method’s overestimation of actual chronological tooth age reveals the need for population-specific standards to better estimate the rate of human dental maturation.     

Using dreams in cognitive behavioral psychotherapy: Theory, method, and examples.

Dream analysis can be a fruitful complementary technique in cognitive–behavioral therapy, providing it is based on a theoretical conception of dreaming and an interpretation method that are both compatible with the principles and methodology of CBT. The present paper first presents some aspects of a cognitive conception of dreaming explaining the occurrence and specificities of dream representations by their production processes. The next section describes an interpretation method that gives the patients the opportunity to find some sources and meanings of their dreams. Finally examples are given of the different ways in which the result of a dream interpretation contributed to therapy. Thanks to their condensed and often exaggerated treatment of a theme, dreams often facilitate becoming aware of cognitive distortions and schemas and help to proceed to cognitive restructuring. They also give to the therapists an opportunity to underline the patient’s resources. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dream emotions, waking emotions, personality characteristics and well-being--A positive psychology approach.

The study aimed to discover whether personality characteristics and waking emotions relate to dreaming emotions. There were 123 participants, ranging in age from 17 to 82 years. It was hypothesized that participants with significant positive emotional trait and state ratings in waking life would experience more positive dreams. Data collection utilized diaries and questionnaires, including Hartmann's Boundary Questionnaire, IPIP Emotional Stability Scale, Staats' Hope Scale, Adult Dispositional Hope Scale, and the Positive and Negative Affect Schedule to assess personality and attitudinal characteristics. Participants recorded and rated their waking and dream emotions over a 3-week period. Median correlations between corresponding waking and dream emotions were .58 for positive emotions and .47 for negative emotions. There were also low, but significant correlations between some personality characteristics and participants' tendency to experience positive or negative emotions in dreams. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Bicultural dreaming as an intersubjective communicative process.

Research in the human sciences has undergone a radical shift in perspective from considering the world as a collection of objects (objectivity) or subjects (subjectivity) to understanding the world as a set of dialogical processes and psychodynamic relationships (intersubjectivity). Likewise, the ethnography of dreaming has changed from a simple gathering, arrangement, interpretation, and statistical comparison of dreams into an intersubjective dialogical communicative and interpretive process. Today, a number of fieldworkers collecting information on dreaming share their own dreams, associations, and interpretations with their subjects, and because of these sociolinguistic practices, they are becoming bicultural. (PsycINFO Database Record (c) 2010 APA, all rights reserved)