MANOVA

MANOVA
  • 文章类型: Journal Article
    几何中位数,适用于高维数据,可以看作是一维数据中使用的单变量中位数的概括。它可以用作识别多维数据位置的鲁棒估计器,在现实场景中具有广泛的应用。本文探讨了使用几何中位数进行高维多变量方差分析(MANOVA)的问题。引入了一种最大类型的统计量,该统计量依赖于各组之间的几何中位数之间的差异。新检验统计量的分布是在零假设下使用高斯近似得出的,并建立了其在替代假设下的一致性。为了近似新统计量在高维的分布,提出了一种野生引导算法,并在理论上证明了这一点。通过在各种维度上进行的模拟研究,样本大小,和数据生成模型,我们演示了基于几何中位数的MANOVA方法的有限样本性能。此外,我们实现了提出的方法来分析乳腺癌基因表达数据集。
    The geometric median, which is applicable to high-dimensional data, can be viewed as a generalization of the univariate median used in 1-dimensional data. It can be used as a robust estimator for identifying the location of multi-dimensional data and has a wide range of applications in real-world scenarios. This paper explores the problem of high-dimensional multivariate analysis of variance (MANOVA) using the geometric median. A maximum-type statistic that relies on the differences between the geometric medians among various groups is introduced. The distribution of the new test statistic is derived under the null hypothesis using Gaussian approximations, and its consistency under the alternative hypothesis is established. To approximate the distribution of the new statistic in high dimensions, a wild bootstrap algorithm is proposed and theoretically justified. Through simulation studies conducted across a variety of dimensions, sample sizes, and data-generating models, we demonstrate the finite-sample performance of our geometric median-based MANOVA method. Additionally, we implement the proposed approach to analyze a breast cancer gene expression dataset.
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  • 文章类型: Journal Article
    基于信号和资源保护理论,本研究旨在确定与职业健康和福祉(OHWB)相关的不同战略组织概况.此外,这项研究探讨了这些不同的组织概况如何影响员工的福祉,特别是关于旷工,情绪疲惫,工作过载,打算退出,和工作满意度。数据来自59个组织和2828名员工。本研究的第一阶段介绍了为确定OHWB组织概况而进行的潜在概况分析。此分析揭示了根据植物的生长阶段隐喻命名的四个组织概况(即,荒地,发芽,萌芽,和盛开的OHWB配置文件)。本研究的第二阶段调查了分配给缺勤组织的潜在概况之间的关联,打算退出,情绪疲惫,工作超负荷的感觉,以及使用MANOVA的员工的工作满意度。结果表明,组织概况影响员工的健康和福祉。在OHWB知名度较低的组织中工作的员工,被称为“荒地简介”,倾向于报告更多的旷工日,更高水平的情绪疲惫,更大的工作过载,较低的工作满意度。与在OHWB知名度较高的组织中工作的员工相比,员工也更有可能表达出更大的辞职意愿(“蓬勃发展的个人资料”)。这项研究对于寻求了解投资于健康和福祉战略如何使员工受益的组织和从业人员很有用。
    Based on the signaling and conservation of resources theories, this study aims to identify different strategic organizational profiles related to occupational health and well-being (OHWB). Additionally, this study explores how these various organizational profiles impact employees\' well-being, specifically in relation to absenteeism, emotional exhaustion, work overload, intention to quit, and job satisfaction. Data were collected from 59 organizations and 2828 employees. The first phase of this study presents the latent profile analysis carried out to identify OHWB organizational profiles. This analysis reveals four organizational profiles that are metaphorically named according to the growth stages of plants (i.e., wasteland, sprouting, budding, and blooming OHWB profiles). The second phase of this study investigates the associations between the latent profiles assigned to the organizations with absenteeism, intention to quit, emotional exhaustion, feelings of work overload, and job satisfaction among their employees using MANOVA. The results show that organizational profiles influence employees\' health and well-being. Employees working in organizations with a low OHWB profile, known as the \"wasteland profile\", tend to report more days of absenteeism, higher levels of emotional exhaustion, greater work overload, and lower job satisfaction. Employees are also more likely to express a greater intention to quit their jobs than those working in organizations with a higher OHWB profile (a \"blooming profile\"). This study is useful for organizations and practitioners seeking to understand how investing in a health and well-being strategy can benefit their employees.
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  • 文章类型: Journal Article
    对土耳其教育计划的兴趣与日俱增,导致伊朗年轻一代对教育移民的兴趣与日俱增。讲师,作为教育计划的执行部分,还可以在满足学生的期望和教育目标方面发挥关键作用。这项研究的目的是识别和比较临界开放度(CO),反思性怀疑论(RS),创新思维(IT),外部责任(EA),通过具有批判性思维理论和21世纪技能考虑镜头的在线调查,为伊朗和土耳其英语作为外语(EFL)讲师提供内部责任(IA)。为此,邀请了方便的伊朗(N=286)和土耳其(N=281)EFL讲师样本自愿参加在线调查。量表由Rosenblatt(2017)的Likert量表组成[1],Semerci(2007)[2],和Sosu(2013)[3],因为概念框架也取自这些研究。在分析阶段,进行MANOVA是为了比较伊朗和土耳其EFL讲师之间的在线调查结果,RS,IT,EA,和IA。对收集的数据的分析发现,土耳其英语教师在CO中获得了更高的分数,RS,EA,和IA比伊朗EFL教练,而伊朗EFL教练在IT就业方面获得更高的分数。结果的含义将表明教育政策制定者与教师培训课程设计师之间的合作。
    The increasing interest in Turkish educational programs has led to the increasing interest in educational migration among the younger Iranian generations. Instructors, as the executive part of educational programs, can also play a key role in satisfying students\' expectations and educational goals. The aim of this study was to identify and compare the Critical Openness (CO), Reflective Skepticism (RS), innovative thinking (IT), external accountability (EA), and internal accountability (IA) for the Iranian and Turkish English as Foreign Language (EFL) instructors through an online survey with Critical Thinking Theory and the 21st century skill consideration lens. To this end, a convenient sample of Iranian (N = 286) and Turkish (N = 281) EFL instructors were invited to take part in the online survey voluntarily. The scales consisted of the Likert scales of Rosenblatt (2017) [1], Semerci (2007) [2], and Sosu (2013) [3], because the conceptual frameworks were also taken from these studies. In the analysis stage, MANOVA was conducted to compare the results of the online survey between Iranian and Turkish EFL instructors in terms of their level of CO, RS, IT, EA, and IA. The analysis of the collected data uncovered that Turkish EFL instructors got higher scores in CO, RS, EA, and IA than Iranian EFL instructors while Iranian EFL instructors received higher scores in the employment of IT. The implications of the results would suggest collaborations between educational policymakers and teacher training course designers.
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  • 文章类型: Journal Article
    本研究的目的是评估SaturejakitaibeliiWierzb的抗菌活性差异。前Heuff.精油在三个生长阶段。使用统计和化学计量学工具,我们试图解释为什么某些植被阶段的精油显示出最高的抗菌活性。S.kitaibelii精油显示出160至10000µgmL-1的最小抑制浓度值,以及630至20000µgmL-1的最小杀菌浓度值。香叶醇,冰片,柠檬烯和对-异丙基苯是S.kitaibelii精油的主要化合物。最丰富的化合物,香叶醇,在40至5000µgmL-1的MIC值和80至10000µgmL-1的MMC值范围内具有抗菌活性。11月记录到所有测试的微生物菌株的精油活性最高。统计分析结果表明,精油中主要成分的比例并不影响精油的抗菌活性。化学计量学分析得出的结论是冰片,spathulenol,从11月开始,石竹烯氧化物和柠檬烯可能是精油抗菌活性的主要贡献者,它们的相互比例很重要。这些结果可能代表了未来精油研究的新方法。
    The objective of the present study was to assess the difference in antimicrobial activity of Satureja kitaibelii Wierzb. ex Heuff. essential oil at three growth stages. In addition, using statistical and chemometric tools, we tried to explain why the essential oil from a certain vegetation stage shows the highest antimicrobial activity. S. kitaibelii essential oils demonstrated minimum inhibitory concentration values from 160 to 10000 μg mL-1 , and minimum microbicidal concentration values from 630 to 20000 μg mL-1 . Geraniol, borneol, limonene and p-cymene are the dominant compounds of S. kitaibelii essential oil. The most abundant compound, geraniol, possesses antimicrobial activity in a range of MIC values from 40 to 5000 μg mL-1 and MMC values from 80 to 10000 μg mL-1 . The highest activity of essential oil for all tested strains of microorganisms was recorded in November. Results of statistical analysis indicate that the percentage of dominant compounds of essential oils does not affect the antibacterial activity of essential oils. Chemometric analyses leads to the conclusion that borneol, spathulenol, caryophyllene oxide and limonene can be the main contributors to the antibacterial activity of essential oil from November and that their mutual ratio is important. These results may represent a new methodological approach for future research on essential oils.
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  • 文章类型: Journal Article
    目的:男性和女性在某些特征中的性二态性程度因样本而异。尽管在生物人类学研究中经常报道性别的特征差异,很少有研究测试统计意义或提供原始数据。TestDimorph是第一个R包,致力于通过利用汇总统计数据来测试和比较不同样本之间的性二态性程度。
    方法:我们提供了两种分析样本间性别二态性程度差异的方法:两个或多个样本的单变量和多变量。该方法遵循主要来自AJBA的出版物。使用单向ANOVA比较样品之间的性别内大小变异性,随后使用对照进行多次成对比较。此外,我们使用相异指数计算两个正态分布的密度函数之间的重叠区域,以及使用95%置信区间的具有推理支持的Hedges\'g。最后,我们对样本之间的性二态模式差异进行了多变量分析。
    结果:我们展示了将TestDimorph函数应用于软件包提供的数据的各种结果。
    结论:该软件包具有许多功能,包括处理汇总统计数据的功能,模拟汇总统计数据,从原始数据中提取汇总统计数据,以便整个分析可以通过软件包进行。
    The degree of sexual dimorphism in certain traits between males and females differ from one sample to another. Although trait differences by sex are often reported in bioanthropological research, few studies test for statistical significance or make raw data available. TestDimorph is the first R package dedicated to testing and comparing the degree of sexual dimorphism among different samples by leveraging summary statistics.
    We provide two approaches of analysis of inter-sample differences in degree of sexual dimorphism: univariate and multivariate for two or more samples. The methods follow upon publications primarily from the AJBA. Within-sex size variability between samples is compared using one-way ANOVA followed by control for multiple pairwise comparisons. In addition, we compute the overlapping area between the density functions of two normal distributions from the mixture intersection index or the non-overlapping area using the dissimilarity index as well as Hedges\' g with inferential support using the 95% confidence interval. Finally, we use a multivariate analysis of differences in patterning of sexual dimorphism between samples.
    We demonstrate various results from applying TestDimorph functions to data supplied with the package.
    The package has many features including functionality for working with summary statistics, simulating data from summary statistics, and the extraction of summary statistics from raw data, so that the entire analysis can be performed through the package.
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  • 文章类型: Journal Article
    药学上重要的长春花生物碱的富集,长春碱和长春新碱,通过不同的采前或采后处理或栽培条件,在马达加斯加长春花(长春花)植物的叶子中,例如,将植物暴露在紫外线照射下,几十年来一直是人们关注的焦点。可见光范围内的受控LED环境提供了监测长春花生物碱相关途径中代谢物浓度变化而不涉及UV相关非生物胁迫的可能性。在我们靶向代谢组学方法的框架内,在UPLC-ESI-QTOF-MS仪器设置的帮助下,从在对照室(中等光照)中生长的C.roseus植物的叶提取物中筛选了64种长春花生物碱和代谢物。低光,和高蓝色/高红色/高远红色条件。在14种代谢物中,可以明确地使用真实标准或初步使用基于高分辨率质谱的方法进行分配,所有三个二聚体长春花生物碱,也就是说,3\',4\'-脱水长春碱,与对照条件相比,长春碱和长春新碱在高蓝光照射下至少富集了9倍:终浓度为961mgkg-1干重,33.8mgkg-1干重,可以达到11.7mgkg-1的干重,分别。在多元统计分析的支持下,长春花生物碱途径的关键代谢产物在高蓝光照射特异性刺激的代谢产物中具有很高的代表性。
    Enrichment of pharmaceutically important vinca alkaloids, vinblastine and vincristine, in the leaves of Madagascar periwinkle (Catharanthus roseus) plants through different pre- or postharvest treatments or cultivation conditions, e.g., exposing the plants to UV-irradiation, has been in focus for decades. Controlled LED environment in the visible light range offers the possibility of monitoring the changes in the concentration of metabolites in the vinca alkaloid-related pathway without involving UV-related abiotic stress. In the frame of our targeted metabolomics approach, 64 vinca alkaloids and metabolites were screened with the help of a UPLC-ESI-QTOF-MS instrumental setup from the leaf extracts of C. roseus plants grown in chambers under control (medium light), low light, and high blue / high red/ high far-red conditions. Out of the 14 metabolites that could be assigned either unambiguously with authentic standards or tentatively with high resolution mass spectrometry-based methods, all three dimer vinca alkaloids, that is, 3\',4\'-anhydrovinblastine, vinblastine and vincristine showed an at least nine-fold enrichment under high blue irradiation when compared with the control conditions: final concentrations of 961 mg kg-1 dry weight, 33.8 mg kg-1 dry weight, and 11.7 mg kg-1 dry weight could be achieved, respectively. As supported by multivariate statistical analysis, the key metabolites of the vinca alkaloid pathway were highly represented among the metabolites that were specifically stimulated by high blue light application.
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  • 文章类型: Journal Article
    本研究文章提供了有关创伤后应激症状差异的数据,和基于感知压力水平的防御机制(低,平均,高),使用1100名意大利人的全国样本,在第一波COVID-19大流行期间收集。参与者通过GoogleForm平台完成了在线调查,其中十项感知压力量表,事件规模的影响-修订,包括40份项目辩护风格问卷。首先,通过确定本次调查样本的第25百分位数和第75百分位数得分来计算感知压力量表的截止值.然后,进行了MANOVA分析,与方差分析和Bonferroni事后分析一起作为后续行动。数据集(。xlsx)包括调查分数,虽然表格和数字提供了分析数据,其中显示了差异。这篇数据文章可能为未来对感知压力的研究提供有用的基础,并建议将临床干预和预防计划集中在相关因素上。
    The present research article provides data about the differences in post-traumatic stress symptoms, and defense mechanisms based on the levels of perceived stress (low, average, high), using a large national sample of 1100 Italian individuals, collected during the first wave of the COVID-19 pandemic. Participants completed an online survey through the Google Form platform, where the Ten-Item Perceived Stress Scale, Impact of Event Scale - Revised, and Forty Item Defense Style Questionnaire were included. First, the cut-offs of the perceived stress scale were calculated by determining the 25th and 75th percentile scores for the sample of this survey. Then, MANOVA analyses were performed, together with ANOVAs and the Bonferroni Post hoc analyses as a follow-up. The dataset (.xlsx) includes the survey scores, while the tables and figures provide the analysed data, where the differences are shown. This data article may provide useful bases for future research on perceived stress and for suggesting associated factors on which focus clinical intervention and preventive programs.
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  • 文章类型: Journal Article
    创伤后应激障碍(PTSD)是一种病理状况,随着时间的流逝,可能导致生活质量显着下降。因此,对可以表征该疾病的元素的研究可以被认为具有极大的临床意义和相关性。本研究的目的是通过经验来区分感知压力的影响,状态焦虑,担心,和防御机制(成熟,神经质,和不成熟)在不同程度的创伤后应激症状。1250名参与者的样本(69.5%是女性,30.5%的男性;Mage=34.52,SD=11.857)完成了一项在线调查,包括事件量表修订的影响,十项感知压力量表,宾夕法尼亚州立大学担忧问卷,四十项防御风格问卷,和状态特质焦虑量表-表格X3。通过实施MANOVA和判别分析对数据进行分析。结果显示,感知压力水平存在显著差异,状态焦虑,和担心,以及基于创伤后应激症状水平的神经质和不成熟防御:F(12,2484)=85.682,p<0.001;Wilk'sΛ=0.430。此外,这些变量在报告轻度心理影响的参与者和可能存在PTSD的参与者之间区分出显著的准确性,在感知到的压力下,这被认为是最好的预测指标。分类结果表明,原始分组病例的分类总体准确率为86.3%。这些发现可能为临床实践提供有用的见解。
    Post-traumatic stress disorder (PTSD) is a pathological condition that may lead to a significant deterioration in the quality of life over time. Therefore, the study of the elements that can characterize the disorder could be considered of great clinical interest and relevance. The aim of the present research was to empirically discriminate the influence of perceived stress, state anxiety, worry, and defense mechanisms (mature, neurotic, and immature) at different levels of post-traumatic stress symptoms. A sample of 1250 participants (69.5% women, 30.5% men; Mage = 34.52, SD = 11.857) completed an online survey including the Impact of Event Scale-Revised, Ten-Item Perceived Stress Scale, Penn State Worry Questionnaire, Forty Item Defense Style Questionnaire, and State-Trait Anxiety Inventory-Form X3. Data were analysed by implementing MANOVA and discriminant analysis. Results showed significant differences in the levels of perceived stress, state anxiety, and worry, as well as neurotic and immature defenses based on the levels of post-traumatic stress symptoms: F(12,2484) = 85.682, p < 0.001; Wilk\'s Λ = 0.430. Furthermore, these variables discriminate significant accuracy between participants who reported a mild psychological impact and those with a probable presence of PTSD, with perceived stress, which was found to be the best predictor. Classification results indicated that the original grouped cases were classified with 86.3% overall accuracy. Such findings may provide useful insight for clinical practice.
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  • 文章类型: Journal Article
    未经评估:为了响应在COVID-19爆发期间保持社交距离的要求,许多员工需要在短时间内从普通办公室改为家庭办公室。本研究的目的是探索这些员工的经验,并评估他们在大流行期间的工作状况变化。
    UNASSIGNED:在挪威一家保险公司中两次收集的面板数据使用了混合方法设计。第一个数据集是在2020年12月收集的(时间1;N=558),2021年3月进行跟进(时间2;N=601)。
    未经评估:我们的研究表明,员工在家工作的主要原因是保持社交距离,避免传染,保护他们所爱的人。灵活性,节省时间和更多的时间与家人和朋友也是动力。大多数员工报告说,他们拥有在家工作所需的技术设备,并希望将来有更多机会使用他们的家庭办公室。一般线性模型(GLM)表明,不同年龄的工作-家庭平衡和工作量是相同的,性别,和工作场所。女性和在家工作的员工报告说,他们更担心在工作中被COVID-19感染。年轻员工报告说,在大流行期间,与同事的社交接触比平时少,与年长的员工相比。总的来说,在家工作的员工比在办公室工作的员工更积极地对待数字解决方案和数字会议。重复措施MANOVA表明,随着时间的推移,所有工作场所的工作动机和数字能力都在下降。家庭办公室员工的生产率提高了,但混合和工作办公室员工的生产率下降了。
    UNASSIGNED:本文有助于了解员工对不同工作现场解决方案的体验,这将有助于预测未来员工体验更多的混合工作。
    UNASSIGNED: In response to the requirement of keeping social distance during the COVID-19 outbreak a lot of employees needed to change from a regular office to a home-office at short notice. The aim of the present study is to explore these employees\' experiences and evaluate changes in their work situation during the pandemic.
    UNASSIGNED: A mixed-method design was used with panel data collected twice in an insurance company in Norway. The first dataset was collected in December 2020 (Time 1; N = 558), with a follow up in March 2021 (Time 2; N = 601).
    UNASSIGNED: Our study indicated that employees\' main reasons for working from home were to keep social distance, avoid contagion and protect their loved ones. Flexibility, timesaving and more time with family and friends were also motivators. Most employees reported that they had the necessary technical equipment to work from home and wanted more opportunity to use their home office in the future. General Linear Models (GLM) indicated that work-family balance and workload were the same across age, gender, and worksites. Women and employees working from home reported more fear of being infected by COVID-19 at work. Younger employees reported experiencing less social contact with colleagues than normal during the pandemic, compared to the older employees. Overall, employees working at home were more positive toward digital solutions and digital meetings than those at the office. Repeated measures MANOVA showed that the work motivation and digital competence decreased over time for all worksites. Productivity increased for home-office employees but decreased for the hybrid and work-office employees.
    UNASSIGNED: This paper contributes to knowledge of employees\' experiences with different worksite solutions, which will be useful for anticipating employees experience in the future with more hybrid work.
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  • 文章类型: Journal Article
    对于与电喷雾高分辨率质谱相关的软件工具,自动和特定地挑选含硒分子实体并不是一个明显的选择。在我们的研究中,基于同位素间距离和同位素比数据的综合模式匹配方法在三个样品的可重复性和硒同位素选择方面进行了严格评估,包括硒化的Torula酵母和硒高积累植物Cardamineviolifolia。应用亲水相互作用液相色谱法为水溶性代谢物提供一步分离,以消除对正交设置或反相色谱保留不良的需要。ICP-MS的协助仅用于色谱验证目的,通过多变量统计工具评估绝对质量缺陷数据在硒代谢物特异性筛查中的参与。高度关注筛选效率和发现的硒化分子的验证,以避免报告伪像。从检测到的>1000个分子条目中,含硒分子的回收率>88%,假阳性率<10%。Isotop(ologu)e对78Se-80Se和80Se-82Se被证明是检测中性能最高的。根据准确的质量信息和假设的脱氨过程,在不考虑硒化合物数据库的情况下,可以为遇到的75种硒中的72种提出元素组成。绝对质量缺陷数据用于将假阳性分子实体的潜在样品特异性亚组与非硒化和硒化实体显著区分开。
    Automated and specific picking of selenium-containing molecular entities has not been an obvious option for software tools associated with electrospray high-resolution mass spectrometry (MS). In our study, a comprehensive pattern matching approach based on intra-isotopologue distance and isotopologue ratio data was critically evaluated in terms of reproducibility and selenium isotope selection on three samples, including selenized Torula yeast and the selenium hyperaccumulator plant Cardamine violifolia. Hydrophilic interaction liquid chromatography was applied to provide a one-step separation for water soluble metabolites to put an end to the need for either orthogonal setups or poor retention on reversed phase chromatography. Assistance from inductively coupled plasma-MS was taken only for chromatographic verification purposes, and the involvement of absolute mass defect (MD) data in selenometabolite-specific screening was assessed by multivariate statistical tools. High focus was placed on screening efficiency and on the validation of discovered selenized molecules to avoid reporting of artefacts. From the >1000 molecular entries detected, selenium-containing molecules were picked up with a recovery rate of >88% and a false positive rate of <10%. Isotop(ologu)e pairs of 78Se-80Se and 80Se-82Se proved to be the most performant in the detection. On the basis of accurate mass information and hypothetical deamination processes, elemental composition could be proposed for 72 species out of the 75 selenium species encountered without taking into account selenocompound databases. Absolute MD data were used to significantly differentiate a potentially sample-specific subgroup of false positive molecular entities from non-selenized and selenized entities.
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