Students＇ Pursuit of Name Brands

现在很多学生全身上下、从穿到用,全都是“名牌”装备。学生阶层到底该不该去追逐“名牌”？TianDong就此现象咨询了Brad。     

Modeling Diagnostic Assessments with Bayesian Networks

This paper defines Bayesian network models and examines their applications to IRT-based cognitive diagnostic modeling. These models are especially suited to building inference engines designed to be synchronous with the finer grained student models that arise in skills diagnostic assessment. Aspects of the theory and use of Bayesian network models are reviewed, as they affect applications to diagnostic assessment. The paper discusses how Bayesian network models are set up with expert information, improved and calibrated from data, and deployed as evidence-based inference engines. Aimed at a general educational measurement audience, the paper illustrates the flexibility and capabilities of Bayesian networks through a series of concrete examples, and without extensive technical detail. Examples are provided of proficiency spaces with direct dependencies among proficiency nodes, and of customized evidence models for complex tasks. This paper is intended to motivate educational measurement practitioners to learn more about Bayesian networks from the research literature, to acquire readily available Bayesian network software, to perform studies with real and simulated data sets, and to look for opportunities in educational settings that may benefit from diagnostic assessment fueled by Bayesian network modeling.     

Pursuing Further Study or Hunting for a Job？

快要大学毕业的Nancy面临两难抉择：是继续学习深造还是尽快找份工作？这个问题令Nancy很是困扰,于是她找Brad帮忙出谋划策。     

你的成熟,如何界定?

你是否向往成熟的自己?成熟看不见,摸不着,却能让人感受到。如果一个人拥有坚毅和决断,这是否就是成熟?     

趣味小发明

正一直在我们杂志上开设专栏、与读者通邮的老朋友Brad最近为我们带来了他儿子所开设的公司的小发明:iMpulse,这个小巧的无线控制器,美观且便于携带,用处嘛,那可是多多呀!My younger son,together with a partner,owns a company headquartered in Los Angeles.The company provides editing services for music and video productions and does some production work of its own on contract.As someone who     

How many times per week should a muscle be trained to maximize muscle hypertrophy? A systematic review and meta-analysis of studies examining the effects of resistance training frequency

Training frequency is considered an important variable in the hypertrophic response to regimented resistance exercise. The purpose of this paper was to conduct a systematic review and meta-analysis of experimental studies designed to investigate the effects of weekly training frequency on hypertrophic adaptations. Following a systematic search of PubMed/MEDLINE, Scoups, and SPORTDiscus databases, a total of 25 studies were deemed to meet inclusion criteria. Results showed no significant difference between higher and lower frequency on a volume-equated basis. Moreover, no significant differences were seen between frequencies of training across all categories when taking into account direct measures of growth, in those considered resistance-trained, and when segmenting into training for the upper body and lower body. Meta-regression analysis of non-volume-equated studies showed a significant effect favoring higher frequencies, although the overall difference in magnitude of effect between frequencies of 1 and 3+ days per week was modest. In conclusion, there is strong evidence that resistance training frequency does not significantly or meaningfully impact muscle hypertrophy when volume is equated. Thus, for a given training volume, individuals can choose a weekly frequency per muscle groups based on personal preference.     

辞旧迎新,庆祝吧!

正年年岁岁花相似,岁岁年年人不同。每年的月份相同,但是我们却在其中不断成长。面对又一年的辞旧迎新之际,怎能不好好庆祝一番?让过去一年的起起伏伏,开心的、失意的,美好的、沮丧的,都化为期待更灿烂的一年的美丽心情!