نتایج جستجو برای: concurrent equating
تعداد نتایج: 63715 فیلتر نتایج به سال:
Combination of data sets from different objects (for example, from two groups of healthy volunteers from the same population) that were measured on a common set of variables (for example, metabolites or peptides) is desirable for statistical analysis in "omics" studies because it increases power. However, this type of combination is not directly possible if nonbiological systematic differences ...
A propensity score is the probability that a participant is assigned to the treatment group based on a set of baseline covariates. Propensity scores provide an excellent basis for equating treatment groups on a large set of covariates when randomization is not possible. This article provides a nontechnical introduction to propensity scores for clinical researchers. If all important covariates a...
The passing rate of the Medical Licensing Examination has been variable, which probably originated from the difference in the difficulty of items and/or difference in the ability level of examinees. We tried to explain the origin of the difference using the test equating method based on the item response theory. The number of items and examinees were 500, 3,647 in 2003 and 550, 3,879 in 2004. C...
Introduction: The purpose of the current study was to examine the effect of concurrent training weeks eight and Gingkobiloba supplement on BDNF in depressed men elderly. Materials and Methods: Forty depressed men elderly were randomly divided into four groups (n = 10) in concurrent training, Gingkobiloba supplemental, concurrent training with Gingkobiloba supplemental and control. In the pre-t...
A significant problem with most functional data analyses is that of misaligned curves. Without adjustment, even an analysis as simple as estimation of the mean will fail. One common method to synchronize a set of curves involves equating “landmarks” such as peaks or troughs. The landmarks method can work well but will fail if marker events can not be identified or are missing from some curves. ...
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