Fulcher G. Variable competence in second language acquisition: A problem for research methodology [J]. System,1995,( 23) : 25-33.Fulcher, G. (1995). Variable competence and second language acquisition: A problem
What is the difference between research methods and research methodology? Broadly, how many types of research design are there? What is the teatment group in an experimental study? How to interpret and report an experimental research study? What is the third- variable problem? What is a b...
Improving the methodology for stepwise model building is an active and rapidly expanding research area in both theoretical and applied statistics. In the sequel, we will focus on particular line of research that combines bootstrapping with automatic backward regression [13–16]. This methodology rando...
2015,Advances in Anesthesia Review article Comparative effectiveness research methodology using secondary data: A starting user’s guide Instrumental variable analysis The main limitation with conventional regression models, or even propensity score methods, is that the decision to undergo 1 treatment modalit...
Translational research in medical education requires the ability to rigorously measure learner performance in actual clinical settings; however, current measurement systems cannot accommodate the variability inherent in many patient care environments. This is especially problematic in emergency medicine, where ...
in the Arctic Ocean and imaged the crustal structure of the slowest-spreading ridge on the Earth. Unexpectedly, we find that crustal thickness ranges between 3.3 km and 8.9 km along the ridge axis and it increased from about 4.5 km to about 7.5 km over the past 5 Myr in ...
in analyzing the causal relationships among latent variables. The participants are expected to understand statistics, economics, and other social sciences with quantitative orientations. Students with their own research projects and data that...
A popular multi-source data integration methodology often used in social and behavior research, bioinformatics, and analytical chemistry9,10,11,12,13,14is the simultaneous component based data integration method (SCA for short). In essence, SCA is an extension of the well-known principal component...
werestudiedandthefutureresearchwasforecasted. Keywords:methodoogyforsystematicengineering;costasindependentvariabe;demonstration;effec- tiveness;cost;performance;tradeoffstudy 收稿日期:2005 11 17 0引言 以费用为独立变量(CAIV)方法是一个以减少 总拥有费用(TOC)为目标,并优化武器系统总体性 能的方法。它包括开发、...
in the latter, no intervention is carried out by the investigator. The foremost experimental design in clinical research is the randomizedcontrolled clinical trial, in which the initial sample of participants is randomly assigned to two groups, i.e., the intervention and the control (usual care)...