Dream intensity profile as an indicator of the hysterical tendencies to dissociation and conversion.

The present study explored the clinical utility of the Dream Intensity Scale (DIS) by evaluating the degree to which the components of dream intensity can serve as indicators of the tendencies to hysterical dissociation and conversion, taking neuroticism and psychological boundaries into consideration. The discriminant models constituted by the DIS scales alone differentiated participants who manifested clinically significant dissociative or conversion symptoms from the remaining sample, with the accuracy rate ranging between 67.2% and 71.5%. The discriminative power of the DIS was so impressive that the inclusion in the models of neuroticism, psychological boundaries, and dissociative or conversion levels—the key factors associated with hysteria—raised the correct classification rate by less than 9%. The relationships between neuroticism, boundary thinness, dissociative features, epileptic-like symptoms, and subjective dream intensity were discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Pain in the mind: Neuroticism, defense mechanisms, and dreaming as indicators of hysterical conversion and dissociation.

This study examined the extent to which the intrinsic predispositions that modulate dream content serve as indicators of the hysterical tendency to conversion and dissociation. The Dream Themes Inventory, Dream Intensity Scale, Limbic System Checklist-33, Dissociative Experiences Scale, Eysenck Personality Questionnaire Revised-Short Form, Boundary Questionnaire-18, and scales for evaluating defense mechanisms were administered to 585 Chinese participants. The findings indicate that the intensity of dream experiences and the narrative content of dreams are useful for identifying individuals with clinically significant hysterical symptoms. Hysterical dissociation is better predicted by the Ego Ideal, Appetite-Instinctual, and Sexual scales of the Dream Themes Inventory, whereas hysterical conversion is better indicated by the Persecution scale. This finding is discussed in relation to the neuropsychological mechanisms of dreaming and delusions. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Confirming the factor structure of the dream intensity inventory.

This study’s primary purpose was to examine the overall quality of the factorial structure of the Dream Intensity Inventory (DII). It was hypothesized that dream intensity was a multifaceted construct that could be accounted for by 3 latent factors, namely Dream Quantity, Dream Vividness, and Altered Dream Episodes. The 1st-order oblique, 1st-order orthogonal, and 2nd-order models, which represented 3 possible versions of the structural relations among the 3 latent factors, were subjected to the confirmatory statistical procedures. The goodness-of-fit indices indicated that the 2nd-order model and the 1st-order model hypothesizing 3 oblique factors were superior to that hypothesizing 3 orthogonal factors. The factorial characteristics of the two well-fitting DII models were shown to be equivalent across 2 samples. These results suggest that the theoretical construct of dream intensity can be pertinently described by the 3-factor measurement model. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The mechanisms of defense and dreaming.

This study examined the degree to which the phenomenological experience of dream intensity and its components are correlated with repression, splitting, and other defense mechanisms. The Dream Intensity Scale, Marlowe-Crowne Social Desirability Scale, Splitting Scale, Defense Style Questionnaire-40, and other related measures were administered to 583 subjects. It is demonstrated that repression as a personality trait is inversely and moderately related to the quantitative aspect of dream intensity (i.e., frequencies of dream awareness, nightmares, and multiple dreams in a single night) but does not influence qualitative sensory experiences in dreams (e.g., hearing sounds in dreams). Moreover, the present findings indicate that the more repressed people are, the less likely they are to report splitting and immature defenses, and the less frequently they experience dreams, with the effect of repression on defenses being greater than that on dream intensity. Accordingly, if both dreams and defense mechanisms are the critical materials to work through in a treatment, then starting with the former may be conducive to the therapeutic progress by provoking less resistance from the client. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Dream Intensity Inventory and Chinese people's dream experience frequencies.

The present study aimed to devise a parsimonious instrument for evaluating both the quantitative and qualitative aspects of dream experiences and to quantify Chinese people's dream experiences in ways that facilitated cross-cultural comparisons. The Dream Intensity Inventory was developed and administered to 348 Chinese university students. Individual differences in dream recall frequency were observed, with some participants recalling dreams almost every morning whereas others recalled dreams less than once a month. By contrast, the Chinese participants exhibited less diverse dream awareness frequencies. Multiple dreams in a single night and nightmares were found to be prevalent among the Chinese participants. On the other hand, fewer than half of the participants experienced regularly voluntary control over dream activities and consciousness. The factor analyses of the items in the Dream Intensity Inventory resulted in three readily interpreted factors, which were labeled as the "dream quantity," "altered dream episodes," and "dream vividness" subscales, respectively. When compared with men, women participants had higher frequencies of regular dream experiences including dream awareness, nightmares, and multiple dreams, as measured by the dream quantity subscale. (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.     

Reliability and stability of dream recall frequency.

Although a large number of studies investigating factors affecting dream recall frequency (DRF) have been carried out, research investigating the reliability and stability of DRF is scarce. Dream diaries of 196 participants kept over at least 28 days were analyzed. The results of the present study indicate that a time period of 2 weeks was sufficient to obtain reliable measurements of interindividual differences in DRF. Despite the high day-to-day fluctuations of dream recall, the stability of this variable was very high. Studies that investigate the stability of DRF by means of other methodological approaches (e.g., questionnaire scales, laboratory awakenings) and over longer time periods (e.g., 1 year) should be carried out to complement the present findings. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Calibration of multivariate scatter plots for exploratory analysis of relations within and between sets of variables in genomic research

The scatter plot is a well known and easily applicable graphical tool to explore relationships between two quantitative variables. For the exploration of relations between multiple variables, generalisations of the scatter plot are useful. We present an overview of multivariate scatter plots focussing on the following situations. Firstly, we look at a scatter plot for portraying relations between quantitative variables within one data matrix. Secondly, we discuss a similar plot for the case of qualitative variables. Thirdly, we describe scatter plots for the relationships between two sets of variables where we focus on correlations. Finally, we treat plots of the relationships between multiple response and predictor variables, focussing on the matrix of regression coefficients. We will present both known and new results, where an important original contribution concerns a procedure for the inclusion of scales for the variables in multivariate scatter plots. We provide software for drawing such scales. We illustrate the construction and interpretation of the plots by means of examples on data collected in a genomic research program on taste in tomato.     

Personality and Dream Recall Frequency: Further Negative Findings

On the basis of previous findings of dream recall frequency being associated with thin boundariness and sensitivity we assessed the association between DRF and variables that appear related to these two measures. Data from 93 participants (47 males, 46 females, mean age 21.3 yrs., SD = 3.5) show that dream recall frequency (DRF) correlates marginally with neuroticism (r = .20) and interrogative suggestibility (r = .21), the latter result indicating that DRF obtained by questionnaire may be subject to demand bias. DRF had very low correlations with various other personality variables (need for cognition, personal locus of control, hypochondriasis, morningness-eveningness), and with narrative memory, confabulation of narrative memory, and habitual sleep length. DRF correlated positively with POMS elated (-depressed) for males (r = .31) but negatively for females (r = –.19), this significant difference in correlations may be due to sex differences in DRF in response to stress. The frequent findings of small or nonsignificant correlations between DRF and personality are discussed in terms of similar low correlations in personality psychology, but we conclude that DRF is usually sampled adequately, and that the results of no simple relationship with personality (except boundariness, creativity, and positive attitude towards dreams) are therefore robust and may indicate that dream recall is mainly determined physiologically.     

Questionnaires and Diaries as Research Instruments in Dream Research: Methodological Issues

Dream questionnaires are widely used in dream research to measure dream recall frequency and various aspects of dream life. The present study has investigated the intercorrelation between questionnaire and diary measures. 285 participants completed a dream questionnaire and kept a dream diary over a two-week period. Results indicate that keeping a dream diary increased dream recall in low and medium dream recallers but decreased dream recall in high dream recallers. The correlation coefficients between questionnaire items measuring aspects of dream content and diary data were large, except for a more complex scale (realism/bizarreness). In the low recall group, however, considerably lower coefficients were found indicating that recall and sampling processes affect the response to global items measuring dream content. Using the example of testing gender differences, the findings of the present study clearly indicate that the measurement technique affects the results. Whereas sufficient internal consistency and retest reliability have been demonstrated for various dream questionnaires, future research should focus on the aspects of validity by comparing questionnaire data to dream content analysis of at least 20 dreams per person.     

Psychometric Evaluation of the Lexington Attachment to Pets Scale (Laps)

Abstract

This paper reports on the development and psychometric evaluation of a scale for assessing emotional attachment of individuals to their pets. Previous attachment scales have suffered variously from low internal consistency and reliance on small or nonrepresentative samples for their development. Telephone interviews of a random, representative sample of 412 pet owners in Fayette County, Kentucky, were completed in September 1990; a 69.5 percent response rate was achieved. From a preliminary set of 42 questions, a final 23-question instrument, the Lexington Attachment to Pets Scale (LAPS), was developed, having excellent psychometric properties. The scale is suitable for use with dog and cat owners. Data on internal consistency, factor structure, and item response theory (IRT) modeling are presented, along with correlations between the LAPS and several domains of variables known to relate to pet attachment.     

Recurrence of typical dreams and the instinctual and delusional predispositions of dreams.

The present study investigated the recurrence of typical dreams and refined Yu's measures for assessing the delusional inclination during dreaming. The Dream Themes Inventory, which consists of typical, delusional, appetitive-instinctual dream themes, was administered to 608 participants. The results indicate that some dream motifs are not only shared by a majority of people but also regularly recur within a person. Moreover, this study demonstrates that virtually all types of delusions and paranoid suspiciousness—including grandiose, persecutory, religious, somatic, jealous, and erotomanic delusions—can be observed in dreams. In addition to fine-tuning Yu's previous Ego Ideal, Grandiosity, and Persecution scales, Erotomania, Appetite-instinct, and Sensorimotor Excitement scales were developed to supplement the assessment of the intrinsic predispositions that modulate dream content. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Forgotten fantasies? Modernity, reenchantment, and dream consciousness.

Why are dreams easily forgotten or difficult to remember? Dream memory is usually attributed to stored fantasies and imaginations in sleep that have distant or no relevance to waking consciousness. Lack of dream recall suggests the modern emphasis on the significance of waking realities at the expense of oneiric experiences. Yet, in the ancient West and many contemporary non-Western societies, dreaming constitutes an unbroken chain of memory to the organization of everyday life. However, reenchantment in the modern context has given new importance to dream consciousness as vital to the development of the creative self. Emphasis on dream practices or dreamwork as leading to various forms of dream control suggests a quest for mastery of inner space. In this regard, training and motivation in dream recall provide an essential tool for advancing the self's well-being. Dreams are not treated as forgotten fantasies but dynamic pathways to new meanings of the self. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Dream interpretation sessions for college students in Taiwan: Who benefits and what volunteer clients view as most and least helpful.

The purpose of the study was to assess the reliability and validity of the Chinese version of the Attitudes Toward Dream measure (ATD) and examine the outcome of dream interpretation for college students in Taiwan. In a sample of 574 college students, factor analysis revealed a single factor for the ATD-Chinese. In the second stage, 60 volunteer clients were assigned randomly to an experimental or control condition. Significant differences were found between experimental and control conditions for postsession ATD-Chinese scores. Initial attitudes toward dreams did not influence perceived gains from dream sessions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Intrinsic and extrinsic religiousness: genetic and environmental influences and personality correlates.

This report presents findings for the Intrinsic (IR) and Extrinsic (ER) religiousness scales from the Minnesota Study of Twins Reared Apart. The scales were shown to be internally consistent, sufficiently distinct from the scales of the California Psychological Inventory and the Multidimensional Personality Questionnaire and unrelated to a number of measures of response style to justify treating them as distinct traits. The I scales also showed considerable evidence of construct validity in its correlations with religious fundamentalism and authoritarianism as assessed by the MMPI and Altemeyer's Right-Wing Authoritarianism scale. Data on IR and ER from 35 pairs of monozygotic twins reared apart (MZA) and 37 pairs of dizygotic twins reared apart (DZA) were fitted to a biometric model and demonstrated significant heritability (0.43 and 0.39), with a model containing genetic plus environmental factors fitting significantly better than a model containing only an environmental component. Twin similarity could not be explained by placement on a self-reported measure of family Moral Religious Emphasis as measured by the Family Environment Scale.     

Individual Differences in the Range of Sensory Modalities Experienced in Dreams.

The present study investigated the relationship between the recalled frequency of sensory modalities experienced in dreams and waking imagery abilities. Five hundred thirty-one undergraduate students completed 4 imagery ability tests and a dream recall questionnaire containing a question on the frequency of experience of the sensory modalities in dreams. A k-means cluster analysis of the Dream Sense Modality Scale indicated that the participants fell into 3 groups: the major modalities group, whose dreams were entirely visual, auditory, and kinesthetic; the all modalities group, who experienced all sense modalities in dreams; and the no modalities group, whose dreams were without sensory content. The participants' scores on the imagery tests in the 3 groups showed significant intergroup differences. The all modalities group showed the highest levels of ability in evoking vivid imagery and controlling visual imagery and the most frequent use of visual imagery compared with the other two groups. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The Most Recent Dreams of 12–13 Year-Old Boys and Girls: A Methodological Contribution to the Study of Dream Content in Teenagers

The present study shows that the Most Recent Dream Method developed for the efficient and economical collection of dream reports from adults can be extended to suburban Caucasian 12–13 year-old boys and girls. A content analysis of 162 Most Recent Dreams from girls and 110 Most Recent Dreams from boys using the Hall and Van de Castle (1996) coding system revealed the same general pattern of gender similarities and differences found in the dream content of young adults. A comparison of the present results with those from participants between the ages of 11–13 and with a similar social background in two longitudinal studies showed several similarities in dream content. The overall findings thus suggest that the Most Recent Dream Method may provide a reasonably representative sample of dream reports from teenagers if at least 100 to 125 Most Recent Dreams are collected for each age group, making cross-sectional developmental studies of teenagers' dreams feasible if the cooperation of a school system can be enlisted. Suggestions for other kinds of studies using Most Recent Dreams from teenagers are also discussed.     

Studies on scale regeneration in the Common goby, Pomatoschistus microps (Pisces)

The longevity of original scales and the process and consequences of scale regeneration in the euryhaline Common goby, Pomatoschistus microps (Kroyer), has been studied by monthly sampling of two populations. Scale regeneration comprises four stages: formation of a new growth centre, a regenerated area in the form of a wide central irregular area lacking concentric circuli: formation of short and widely spaced circuli at the outermost region of the regenerated area: a check in regenerated scale growth on reaching the size of the original scales: and the commencement of normal growth similar to that of the surrounding original scales. Growth of regenerated scales within 30 days was not sufficient to attain the same size of the original ones. The average percentage of regenerated scales in successive months during the life span of P. microps is about 20% in immature fish and sharply increases up to about 60% of the total scales during the breeding season. The correlation between sharp increases in regenerated scales and the breeding season is also confirmed on examining scales from two other gobioid species, Gobius paganellus and Gobius cobitis. It is suggested that the loss of a large number of scales may result in the check in body growth during the breeding season.     

Principal component score modeling for the rapid description of chromatographic separations

This paper describes the use of Principal Component Analysis (PCA) as a tool for modeling chromatographic separations. PCA is an analytical technique developed to extract key information out of large data sets and to develop relationships and correlations. The basis of the proposed model is the use of PCA to correlate experimental chromatographic data across different process variables or scales. The generated correlations are then used to provide for the simulation of additional chromatographic runs not included in the initial dataset. The approach is demonstrated by application to the cation exchange separation of a four protein component feed comprising ovalbumin, ovatransferrin, lysozyme, and myoglobin. A good fit between modeled and experimental data was found, and the ability of the method to model additional chromatographic separations not within the original dataset is demonstrated. The technique has the potential to accommodate changing system variables such as column dimensions as well as process variables including sample volume and salt gradient. It provides a potentially powerful tool for the rapid investigation of scale-up effects and for the minimization of the material inventories needed for such studies.