Examining the Effects of Incremental Case Presentation and Forecasting Outcomes on Case-Based Ethics Instruction

Case-based reasoning has long been used to facilitate instructional effectiveness. Although much remains to be known concerning the most beneficial way to present case material, recent literature suggests that simplifying case material is favorable. Accordingly, the current study manipulated two instructional techniques, incremental case presentation and forecasting outcomes, in a training environment in an attempt to better understand the utility of simplified versus complicated case presentation for learning. Findings suggest that pairing these two cognitively demanding techniques reduces satisfaction and detracts from the effectiveness of the learning approach. Implications regarding the use of instructional techniques in training programs are discussed.     

Distal rhythm influences whether or not listeners hear a word in continuous speech: Support for a perceptual grouping hypothesis

Due to extensive variability in the phonetic realizations of words, there may be few or no proximal spectro-temporal cues that identify a word’s onset or even its presence. Dilley and Pitt (2010) showed that the rate of context speech, distal from a to-be-recognized word, can have a sizeable effect on whether or not a word is perceived. This investigation considered whether there is a distinct role for distal rhythm in the disappearing word effect. Listeners heard sentences that had a grammatical interpretation with or without a critical function word (FW) and transcribed what they heard (e.g., are in Jill got quite mad when she heard there are birds can be removed and Jill got quite mad when she heard their birds is still grammatical). Consistent with a perceptual grouping hypothesis, participants were more likely to report critical FWs when distal rhythm (repeating ternary or binary pitch patterns) matched the rhythm in the FW-containing region than when it did not. Notably, effects of distal rhythm and distal rate were additive. Results demonstrate a novel effect of distal rhythm on the amount of lexical material listeners hear, highlighting the importance of distal timing information and providing new constraints for models of spoken word recognition.     

血清Cys C的检测对肾移植术后患者肾功能评价的临床意义

探讨分析血清胱抑素C（Cys C）水平在肾移植术后患者肾功能监测中的应用价值.对25例肾移植成功患者在术前、术后第1、3、5、7、10天的血清Cys C、Scr、β2-MG、BUN水平进行动态监测,同时随机抽取健康体检者中的20例作为对照组.发现移植组的Cys C、Scr、β2-MG、BUN水平在术前均明显高于健康对照组（P＜0.01）.这四项指标在手术后第一天都有所下降,且术后第1、3、5、7、10天的水平都比术前低（P＜0.01）.四项指标与GFR的关系均为显著性负相关（P＜0.01）,其中血清Cys C与GFR的相关性最好.Cys C、Scr、β2-MG、BUN检测后的ROC曲线下面积分别是：0.937、0.838、0.798、0.772,其差异都具有统计学意义（P＜0.05）.血清Cys C优于Scr、β2-MG、BUN,在肾移植患者术后的动态监测中具有重要的临床应用价值.     

Properties of bootstrap tests for N‐of‐1 studies

N‐of‐1 study designs involve the collection and analysis of repeated measures data from an individual not using an intervention and using an intervention. This study explores the use of semi‐parametric and parametric bootstrap tests in the analysis of N‐of‐1 studies under a single time series framework in the presence of autocorrelation. When the Type I error rates of bootstrap tests are compared to Wald tests, our results show that the bootstrap tests have more desirable properties. We compare the results for normally distributed errors with those for contaminated normally distributed errors and find that, except when there is relatively large autocorrelation, there is little difference between the power of the parametric and semi‐parametric bootstrap tests. We also experiment with two intervention designs: ABAB and AB, and show the ABAB design has more power. The results provide guidelines for designing N‐of‐1 studies, in the sense of how many observations and how many intervention changes are needed to achieve a certain level of power and which test should be performed.     

对齐法在单因子和三因子多组比较中允许的不等参数率

在传统的多组验证性因子分析中,进行因子均值比较的前提条件是模型满足强测量不变性假设,但该假设在实证研究中很难满足。这时,Asparouhov和Muthén(2014)提出的对齐法是一种可供备选的多组分析法。通过蒙特卡洛模拟研究,探究了在对齐法精确估计模型参数前提下所允许的不等参数率范围。研究发现：在平均组样本量充足,识别算法为固定识别算法等理想状态下,对齐法在单因子模型多组比较中所允许的不等参数率可以是100%;在三因子模型中所允许的不等参数率上限是20%至30%;在此范围内,对齐法允许更多高程度不等参数;在组数目从30、15或9降至3时,对齐法能允许更多的不等参数在模型中。     

成功心肺复苏的合适急救团队人数的研究

探讨成功心肺复苏中合适的急救团队人数。采用回顾性分析方法,对64例实施心肺复苏成功的心搏骤停患者临床资料进行对比分析。医生3人～4人组完成高质量胸外按压（46．9％）、气管插管（42．2％）的比率高于1人～2人组（P〈0．05）,护士4人～5人组高质量完成相关操作优于2人～3人组（P〈0．05）。医师3人～4人、护士4...     

心房颤动处理策略上的一些新认识

阐述近年来对心房颤动部分处理方法的新进展。心室率控制：质疑静息中或剧烈活动时严格控制心室率,引用RACE2研究,提出宽松的心率控制,其预后与严格控制的相仿。药物转复房颤：首选为胺碘酮,决奈达龙已获FDA批准用于非永久性房颤,伊布利特近年提出在射频消融过程中应用,可使心房碎裂波区缩小,消融易成功。其他新药尚无临床确切疗效...     

The similarity heuristic

Decision makers often make snap judgments using fast‐and‐frugal decision rules called cognitive heuristics. Research into cognitive heuristics has been divided into two camps. One camp has emphasized the limitations and biases produced by the heuristics; another has focused on the accuracy of heuristics and their ecological validity. In this paper we investigate a heuristic proposed by the first camp, using the methods of the second. We investigate a subset of the representativeness heuristic we call the “similarity” heuristic, whereby decision makers who use it judge the likelihood that an instance is a member of one category rather than another by the degree to which it is similar to others in that category. We provide a mathematical model of the heuristic and test it experimentally in a trinomial environment. In this environment, the similarity heuristic turns out to be a reliable and accurate choice rule and both choice and response time data suggest it is also how choices are made. We conclude with a theoretical discussion of how our work fits in the broader “fast‐and‐frugal” heuristics program, and of the boundary conditions for the similarity heuristic. Copyright © 2009 John Wiley & Sons, Ltd.