Menstrual synchrony can be assessed,inherent cycle variability notwithstanding: commentary on Schank (2001)

J. C. Schank (2001) argued that biases in the calculation of synchrony (due to inherent variability in the menstrual cycle) and in respondents' recall of menstrual dates can produce spurious results. In this commentary, the major flaws in J. C. Schank's arguments regarding the calculation of synchrony are presented. Low standard deviations (< 2.0) of interwomen cycle lengths were found in a reanalysis of the Bedouin family data (A. Weller & L. Weller, 1997). This obviates J. C. Schank's major assumption that a high degree of cycle variability exists and his concern that high variability produces a spurious increase of onset differences over time. Furthermore, research that has used random control groups has found significantly greater levels of synchrony in their experimental groups, refuting J. C. Schank's arguments.     

Psychometric evaluation of the Menstrual Joy Questionnaire

Analysis of 10 terms in the Menstrual Joy Questionnaire of Delaney, Lupton, and Toth indicated that the 34 undergraduate students did not agree on the definitions of scale items. The authors discuss the use of this questionnaire as a stimulus in experimental research and as a measure of positive perimenstrual experience.     

“神功“揭秘第二部分轻气功不是特异功能

轻气功,是通过“气功大师“的发功运气,使自己的体重变轻的功夫.其实这是不可能办到的事情,如果哪位气功大师能站在磅秤上,通过发功运气使自己的体重减轻十斤,说明地球吸引力失灵,我团便可以奖励他十万元.……     

Menstrual Reactivity: The Role of Gender-Specificity,Anxiety Sensitivity,and Somatic Concerns in Self-Reported Menstrual Distress

To determine the impact of gender roles, anxiety sensitivity, and somatic concerns on self-reported menstrual distress, two studies were conducted. In the first study using 278 primarily Caucasian college females, anxiety-sensitivity level, not current menstrual cycle phase, influenced reports of menstrual symptom severity and depression. Regardless of cycle phase at the time of self-report, women high in anxiety sensitivity reported significantly more depressed mood, trait anxiety, and retrospective menstrual symptoms. In the second study of 158 primarily Caucasian college females varying in anxiety sensitivity levels, adherence to sex role stereotypes, feminist beliefs, and illness attitudes were examined. Participants also completed measures of general premenstrual, most-recent premenstrual, and current menstrual symptoms. Women high in anxiety sensitivity reported the highest levels of sex-specificity, feminist embeddedness, and illness attitudes, with sex-specificity accounting for significant variance in current menstrual symptoms. Results are discussed within the context of the menstrual reactivity hypothesis, which proposes that beliefs surrounding the menstrual cycle and body sensations expectancies contribute to self-reports of greater menstrual distress. Women high in anxiety sensitivity appear to represent one subgroup vulnerable to menstrual reactivity.     

Menstrual hormone changes and instinctual tendencies in dreams

Seventeen female college students completed dream questionnaires for every dream recalled over two menstrual cycles. Scales were devised to measure obvious and symbolic maternal and heterosexual dream content. Menstrual cycles were divided into follicular (progesterone-absent) and luteal (progesterone-present) phases for comparison within each subject. There were higher obvious and symbolic maternal scores in the luteal phase. It was concluded that hormones influence instinctual tendencies as expressed in dreams.     

血液净化防治多器官功能障碍综合征的思考

血液净化防治多器官功能障碍综合征已在临床医疗中广泛应用.简要介绍血液净化及多器官功能障碍综合征的相关知识.重点运用科学思维分别从系统论方法、控制论方法、信息方法三方面阐述两者间的内在联系,为临床工作提供新的指导.     

血液净化防治多器官功能障碍综合征的思考

血液净化防治多器官功能障碍综合征已在临床医疗中广泛应用。简要介绍血液净化及多器官功能障碍综合征的相关知识。重点运用科学思维分别从系统论方法、控制论方法、信息方法三方面阐述两者间的内在联系,为临床工作提供新的指导。     

Symptom Attributions Across the Menstrual Cycle in Women with Panic Disorder

Women with panic disorder are likely to experience greater menstrual-specific symptoms (e.g., headaches, cramps) as well as more panic/anxiety-related symptoms (e.g., dizziness, faintness, chest pain, heart pounding), and may be more likely to experience these symptoms during the premenstrual phase. This study examines the attributions women make about the somatic and affective symptoms they experience during the menstrual cycle. Using a 30-day prospective design, women with and without panic disorder monitored physical and affective symptoms. Participants reported on severity of various symptoms and a primary cause for each symptom (menstrual cycle-related, panic/anxiety related, stress-related, health-related). Women with panic disorder reported more panic attacks during the premenstrual phase compared to other cycle phases. They also reported more severe affective and panic symptoms during the premenstrual phase compared to other phases, but did not significantly differ from the comparison group in menstrual symptom severity across the three cycle phases. Although women with panic disorder attributed more panic/anxiety-related causes for their symptoms across the menstrual cycle, they were able to discriminate between panic/anxiety causes and menstrual cycle-related causes. Women with panic disorder may benefit for therapy that focuses on their exacerbation of panic symptoms during the premenstrual phase.     

Race Bias Tracks Conception Risk Across the Menstrual Cycle

ABSTRACT— Although a considerable body of research explores alterations in women's mating-relevant preferences across the menstrual cycle, investigators have yet to examine the potential for the menstrual cycle to influence intergroup attitudes. We examined the effects of changes in conception risk across the menstrual cycle on intergroup bias and found that increased conception risk was positively associated with several measures of race bias. This association was particularly strong when perceived vulnerability to sexual coercion was high. Our findings highlight the potential for hypotheses informed by an evolutionary perspective to generate new knowledge about current social problems—an avenue that may lead to new predictions in the study of intergroup relations.     

自由、自主、生育权与处境论(上)

自由、自主和生育权无疑是个大题目,不是一篇小文章所能囊括的,若要从一个跨文化角度去充分详尽地讨论这个问题,就更需要一部巨著来完成了。我既无此雄心,也不至于不现实至此。本文的目标比较适中,只想表明这样一个主题:即使在民主化的西方,自由和自主虽须有充分保障,但包...     

Shifts in Masculinity Preferences Across the Menstrual Cycle: Still Not There

Harris (2011) failed to find support for the popular hypothesis that women are attracted to masculine-faced men when conception is likely but attracted to feminine-faced men during other menstrual cycle phases. In response, DeBruine et al. (2010) wrote a commentary criticizing Harris theoretical analysis and data (e.g., sample age). The current paper addresses those criticisms with new data analysis, additional literature review, and logical arguments. Harris’ results are not attributable to her sample’s age; no preference shift was found for the subsample of women under 30 years old and no hint of an interaction existed between participant age group and menstrual cycle phase. This work also revisits the questionable assumptions inherent in the cycle shift hypothesis and reviews literature that suggests such assumptions are not tenable.     

Physical Characteristics of the Menstrual Cycle and Premenstrual Depressive Symptoms

ABSTRACT— Little is known about the associations between premenstrual depressive symptoms and specific physical symptoms of the menstrual cycle. In a nonclinical sample of 183 female university students, six physical symptoms of the menstrual cycle (headaches, skin changes, gastrointestinal problems, breast changes, and coagulation and heaviness of menstrual bleeding) were tested for their associations with premenstrual depressive symptoms. The physical symptoms explained nearly 30% of the variance in depressive symptoms. Moreover, when the summed score for all six physical symptoms was used as a predictor of depressive symptoms, a strong linear effect and a moderate curvilinear effect were observed. These results could not be explained by response bias or by the presence of a small group of highly depressed individuals. This study emphasizes the need to consider physical symptoms of the menstrual cycle to better understand premenstrual depressive symptoms, and suggests that the contribution of the menstrual cycle to depressive symptoms in the general population is underrecognized.     

Changes in Moods and Activation Levels During the Menstrual Cycle in Experimentally Naive Subjects

Two experiments providing additional validity data on the Profile of Mood States and the Thayer Activation-Deactivation Adjective Check List were per-formed. In the third and main experiment, seven normally menstruating women filled out both questionnaires at the same time every day for 90 days. They were not aware that they were participating in a study of menstruation. Analysis of the time series records of individual women revealed relatively few significant fluctuations in moods and activation levels. Analysis of the group data showed that Fatigue, Confusion, Deactivation/Sleep, and Depression/Dejection were significantly lower in the premenstrual phase than in the periovulatory phase of the cycle, while General Activation was higher. Anger/Hostility and Confusion were both lower in the menstrual phase than in the periovulatory phase. On a retrospective menstrual distress questionnaire, these same subjects say that they experience increases in anxiety, irritability, depression, and tension in the premenstrual phase of the cycle. The differences between individual and group data and the apparent discrepancy between daily self-reports and retrospective questionnaires are discussed.     

Menstrual cycle effects on task performance examined in the context of stress research

The study examined the effects of degree of paramenstrual distress, signal frequency, task load and time on task on psychomotor performance across the menstrual cycle. Simple reaction time, choice reaction time and pursuit tracking were the tasks employed, and performance was assessed using the metrics of mean level, variability, and errors of omission and commission. The results showed performance as a function of menstrual cycle phase and paramenstrual distress to be highly task and metric specific, a finding typical of stressor variables: pursuit tracking was affected by phase, with mean performance at its worst premenstrually; choice reaction time was dependent on a complex interaction of experimental variables and measurement metrics; simple reaction time showed no significant effects. Patterns of attention allocation in a time-sharing situation combining both pursuit tracking and choice reaction time components were also investigated. Trends here indicated relatively better performance both menstrually and intermenstrually as components increased in signal/response frequency, with a corresponding deterioration premenstrually. Overall performance capacity appeared to be greatest at menstruation, and the degree of attentional selectivity was least. High distress women performed better on low frequency components, whereas asymptomatic women did better at higher signal rates.     

Encoder Enhanced Atrous (EEA) Unet architecture for Retinal Blood vessel segmentation

The retinal blood vessel segmentation is required for continuously monitoring the blood vessel in most of the retinal disease diagnosis. Deep learning approaches are accepted as the promising techniques for biomedical image segmentation. In this paper, Encoder enhanced Atrous architecture is proposed for retinal blood vessel segmentation. The encoder section is enhanced by improving the depth concatenation process with the addition layers. The proposed architecture is evaluated on the publicly available databases DRIVE, STARE, CHASE_DB1 and HRF using metrics like accuracy, sensitivity, specificity, Dice coefficient, and Mathew’s correlation coefficient. The proposed architecture performs better compared to the conventional Unet architecture in terms of accuracy by 0.35% and 0.83% for DRIVE and STARE respectively. In terms of specificity and Dice score, the proposed architecture also shows improved results compared to the Unet architecture.     

Success and Failure, Gender Differences, and the Menstrual Cycle

Eighty-one women and 26 men were led to succeed or fail at a task. No differences in actual performance were found between men and women or among women in different menstrual phases. Although they had participated alone, women felt worse, less competent, and less "up" than men after both success and failure. After success women also felt less satisfied, felt they had made lower scores, expected to perform worse, and rewarded themselves less than men. After success, women who were menstruating at the time of the experiment reported feeling better than women in other menstrual phases on most measures. A possible explanation was that menstruating women may have expected to perform poorly.     

月经周期对女性知觉性侵犯遭遇的影响

女性在排卵期遭遇强奸或其它形式的性侵犯可能会受到较大伤害。进化历史中女性遭遇性侵犯的危险不断重现使现代社会女性在排卵期对男性性侵犯的线索较为敏感。本研究旨在探讨女性被试观看男性试图吸引其它女性的录像后如何评价每位男性性侵犯的可能性。研究发现接近排卵期的女性比不处于排卵期的女性更可能认为男性会进行性侵犯。这些发现显示,女性具有特定的知觉进化机制来警惕性侵犯,这种特定的进化机制可能受到月经变化的调节