Does modality matter? A latent profile and transition analysis of sedentary behaviours among school-aged youth: The UP&DOWN study     

David Sánchez-Oliva  Rebecca M. Leech  Alberto Grao-Cruces  Irene Esteban-Cornejo  Carmen Padilla-Moledo  Oscar L. Veiga 《Journal of sports sciences》2020,38(9):1062-1069

ABSTRACT

The aims of this study were to identify profiles of sedentary behaviour (SB) patterns, based on leisure-time self-reported SB modalities (screen, educative, social, and relaxing) and to evaluate changes in these profiles over 2 years among Spanish youth aged 8–18 years. Latent profile analysis (LPA), a data-driven analytic approach, was used to identify groups of boys and girls (n = 1553; 48% girls; mean±SD age: 12.56 ± 2.49 y) with distinct SB profiles using the SB modalities (time/d) as input variables. Latent transition analysis, an extension of LPA that uses longitudinal data, was used to analyse 2-year changes in these profiles. At baseline, four and three SB profiles were found among boys (labelled: screen, educative, social, and relaxing) and girls (labelled: screen/social, educative, and relaxing), respectively. Overall, more girls (range: 48%-67%) had the same profile over time, than boys (40%-52%). Participants with a screen or relaxing SB profile at baseline were more likely to have an educative profile after 2 years. Youth with a social and an educative SB profile at baseline were more likely to transition to profiles characterized by higher screen and social SB, respectively. Using a novel and person-centered approach, this study identified gender-specific SB profiles that were moderately stable over time.  相似文献   

公安类考生体能测试考前心理状况的调整     

郦树龙  张银满 《武汉体育学院学报》2002,36(4):52-53

运用问卷、文献资料和调查访问等研究方法，对浙江省近两年来公安类考生的考前心理状态进行了分析研究，结果表明，有针对性地从意识和行为上加强应考前心理状态的调整对发挥考生潜能，取得优异成绩有重要意义，针对考生的不利心理状态，提出了消除的方法。  相似文献   

外来词产生及流行的修辞学理据     

周欣 《荆州师范学院学报》2005,28(3):102-104

外来词属于词汇学的范畴。外来词通过潜词显化、显意符号化、显词重叠化三种途径产生，其中的显词重叠化造成了外来词与汉语词的同义关系，而外来词独特的修辞效果也使人们在同义手段选择活动中更青睐于外来词。  相似文献   

燃烧-碘量法测定钢铁中硫含量的实验研究     

姜网书 《扬州职业大学学报》2004,8(4):45-47

燃烧一碘量法是测定钢铁中硫含量的常用方法之一，用此法测定时炉温、助熔剂、氧气流量及适当的预热时间、淀粉水溶液的配制和使用等都对测定结果有很大的影响。本通过大量实验，找出了最佳的测定条件。  相似文献   

校园文化中的隐性课程对职业素质养成的作用     

黎逢保 《岳阳职业技术学院学报》2007,22(6):37-39

校园文化中的隐性课程会让学生淡化或摆脱课业的压抑,使学生的兴趣、爱好得到某种程度的张扬,心理压力得到一定的舒缓,文明、进步、健康、蓬勃、富有特色、奋斗不息的校园精神是校园文化的核心,具有启迪、感化学生的作用,对学生身心健康的影响是深刻而持久的.  相似文献   

Latent Profiles of Reading and Language and Their Association With Standardized Reading Outcomes in Kindergarten Through Tenth Grade     

Barbara R. Foorman  Yaacov Petscher  Christopher Stanley  Adrea Truckenmiller 《Journal of research on educational effectiveness》2017,10(3):619-645

The objective of this study was to determine the latent profiles of reading and language skills that characterized 7,752 students in kindergarten through tenth grade and to relate the profiles to norm-referenced reading outcomes. Reading and language skills were assessed with a computer-adaptive assessment administered in the middle of the year and reading outcome measures were administered at the end of the year. Three measures of reading comprehension were administered in third through tenth grades to create a latent variable. Latent profile analysis (LPA) was conducted on the reading and language measures and related to reading outcomes in multiple regression analyses. Within-grade multiple regressions were subjected to a linear step-up correction to guard against false-discovery rate. LPA results revealed five to six profiles in the elementary grades and three in the secondary grades that were strongly related to standardized reading outcomes, with average absolute between-profile effect sizes ranging from 1.10 to 2.53. The profiles in the secondary grades followed a high, medium, and low pattern. Profiles in the elementary grades revealed more heterogeneity, suggestive of strategies for differentiating instruction.  相似文献   

感性设备同名端的判断     

万学斌 《孝感职业技术学院学报》2002,5(1):76-79

本文介绍了一些常见感性设备同名端判断的方法,对其正确使用和维护有重要的实际意义。  相似文献   

Statistical Power of the Multiple Domain Latent Growth Model for Detecting Group Differences     

Kejin Lee  Tiffany A. Whittaker 《Structural equation modeling》2018,25(5):700-714

The latent growth model (LGM) in structural equation modeling (SEM) may be extended to allow for the modeling of associations among multiple latent growth trajectories, resulting in a multiple domain latent growth model (MDLGM). While the MDLGM is conceived as a more powerful multivariate analysis technique, the examination of its methodological performance is very limited. Hence, the present study compared the power of the MDLGM with that of a set of univariate LGMs for detecting group differences in growth rates over time using a Monte Carlo study with a two-group and two-domain design. The results indicated that there were different scenarios where the power rates for the MDLGM were greater than that of the set of LGMs (and vice versa) due to a joint function of the two domains’ intercorrelation size and the group difference effect size.  相似文献   

由潜抑到彰显——论老舍的民族归属意识     

银洁 《湖南第一师范学报》2007,7(3):123-124

满族作家老舍的民族归属意识并非像沈从文和张承志等少数民族作家一样,始终自觉彰显,而是以解放前后为界,经历了由潜抑到彰显的转变历程。老舍一生都有着始终如一的满族归属意识,但在解放前一直处于一种压抑状态。直到解放后才开始彰显自己的民族归属意识。  相似文献   

锅炉给水泵富裕扬程过高的危害     

邓矛 《淮南职业技术学院学报》2002,2(1):33-35

通过对锅炉水泵的H－Q曲线及P－Q曲线的研究分析，结论为泵的富裕扬程过高，将使整个系统的效率降低，还会使泵产生气体，发生汽蚀和供水不足，并提出了相应的解决方法。  相似文献