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431.
432.
产后抑郁是产后时期出现的抑郁症状,对女性及其后代甚至家人都会造成严重的负面影响。产后抑郁稳定的预测因素是遗传基因、依恋风格、童年负性生活经历和激素水平的变化;涉及的脑区和神经网络集中在前额叶皮层、扣带回、杏仁核和海马等脑区及相应神经网络。未来应在探索综合的预测模型、男性伴侣的对照试验和基于大脑可塑性特征的干预模式等方面展开深入研究。 相似文献
433.
For (0, 1) scored multiple-choice tests, a formula giving test reliability as a function of the number of item options is derived, assuming the knowledge or random guessing model, the parallelism of the new and old tests (apart from the guessing probability), and the assumptions of classical test theory. It is shown that the formula is a more general case of an equation by Lord, and reduces to Lord's equation if the items are effectively parallel. Further, the formula is shown to be closely related to another formula derived from Lord's randomly parallel tests model. 相似文献
434.
Phasic and tonic measures of electrodermal activity were examined in a simple habituation paradigm, using innocuous visual
stimuli. Separate groups were used to investigate the effects of stimulus significance, as manipulated by instructions. One
group had no stimulus-related task (indifferent group), while the other was asked to silently count the stimuli to report
to the experimenter later (significant group). Prestimulus skin conductance levels were considered as measures of the arousal
level at each stimulus presentation, and the subsequent electrodermal responses were taken as the phasic orienting reflex
(OR) elicited by each stimulus. Changes in prestimulus arousal were taken as measures of the tonic OR to the experimental
series. Marked group differences were found in both phasic and tonic components of the OR. Some, but not all, of the significance
effects in the phasic OR were attributable to differences in arousal. The results are discussed in the context of theoretical
accounts of the OR. 相似文献
435.
We assume that athletic success is associated with certain beliefs that on the one hand promote performance-enhancing behavior (training volume), but on the other hand can also be detrimental to health (sports addiction). These beliefs are succinctly characterized by the title of the 9-item “Mind-over-Body” scale presented here. They are the three beliefs that 1) athletic performance requires a high level of effort, 2) that willpower plays an important role in athletic success, and 3) that athletic success requires pain tolerance. A total of six web-survey-based studies with a total of 1121 participants (approximately gender parity), including individuals with different levels of athletic performance (no competition; amateur sport; regional, national, or international competition), examined the psychometric network and construct and criterion validity of the MoB scale. Exploratory graph analyses, which included the studies with the largest sample sizes, showed that the three belief components (effort, willpower, pain) form separable communities within the MoB network and that the MoB items form communities distinct from self-control and self-efficacy. Meta-analyzed correlations across all six studies showed low positive correlations with self-control and self-efficacy. In terms of criterion validity, MoB beliefs were positively correlated with training volume and exercise addiction. We discuss MoBs as “on the edge of unhealthy” and place MOBs within a framework of related but distinct concepts. 相似文献
436.
Seunghoo Lee Jorge Mendoza 《The British journal of mathematical and statistical psychology》2023,76(1):106-130
Organizational and validation researchers often work with data that has been subjected to selection on the predictor and attrition on the criterion. These researchers often use the data observed under these conditions to estimate either the predictor or criterion's restricted population means. We show that the restricted means due to direct or indirect selection are a function of the population means plus the selection ratios. Thus, any difference between selected mean groups reflects the population difference plus the selection ratio difference. When there is also attrition on the criterion, the estimation of group differences becomes even more complicated. The effect of selection and attrition induces measurement bias when estimating the restricted population mean of either the predictor or criterion. A sample mean observed under selection and attrition does not estimate either the population mean or the restricted population mean. We propose several procedures under normality that yield unbiased estimates of the mean. The procedures focus on correcting the effects of selection and attrition. Each procedure was evaluated with a Monte Carlo simulation to ascertain its strengths and weaknesses. Given appropriate sample size and conditions, we show that these procedures yield unbiased estimators of the restricted and unrestricted population means for both predictor and criterion. We also show how our findings have implications for replicating selected group differences. 相似文献
437.
Construal level theory states that future events that are nearer in the future and events that are more likely to happen have lower construal levels, and therefore have less detail, than events that are further away and/or less likely to happen. Consistent with this theory, the number of details in a statement can be a moderately good cue to deception. If veracity and temporal distance both affect detail, detail may only be a good cue to deception about events that occur at certain temporal distances. This paper describes a study on whether temporal distance and veracity affect detail levels in statements about intentions. The results suggest that temporal distance and veracity do not affect detail levels in this dataset. Intentions that were completed also did not differ from uncompleted intentions. Overall, the study found no support for the hypothesised effects of temporal distance and veracity on level of detail. 相似文献
438.
Females choosing taxi driving as a career is rare, therefore, investigating such samples is often difficult. Speeding is one of the most common driving violations, however, there has been no research looking into female taxi drivers’ speeding issue. This study explores the factors of female taxi drivers’ speeding offenses in Taiwan. Data is based on a national survey and includes 235 professional female taxi drivers. The results indicate that female taxi drivers work approximately 27.37 days per month, at a mean of 9.76 h per day. Of the female taxi drivers represented in this study, 22.8% reported at least one speeding offense over a one-year period. The results of a logistic regression model reveal that the determinant factors associated with female taxi drivers’ speeding offenses are significantly related to age, educational level and mileage driven. However, job experience, business operating style, and vehicle engine size are not associated with committing speeding offenses. Practical implications for traffic safety of female taxi drivers are also discussed. 相似文献
439.
440.
Identification of control strategies during agility performance is significant in understanding movement behavior. This study aimed at providing a fundamental mathematical model for describing the motion of participants during an agility drill and to determine whether skill level constrained model components. Motion patterns of two groups of skilled and unskilled participants (n = 8 in each) during performance of a forward/backward agility drill modeled as limit-cycles. Participant movements were recorded by motion capture of a reflective marker attached to the sacrum of each individual. Graphical and regression analyses of movement kinematics in Hooke’s plane, phase plane and velocity profile were performed to determine components of the models. Results showed that the models of both skilled and unskilled groups had terms from Duffing stiffness as well as Van der Pol damping oscillators. Data also indicated that the proposed models captured on average 97% of the variance for both skilled and unskilled groups. Findings from this study revealed the movement patterning associated with skilled and unskilled performance in a typical forward/backward agility drill which might be helpful for trainers and physiotherapists in enhancing agility. 相似文献