Using Likelihood Ratios to Detect Invalid Performance with Performance Validity Measures

Invalid measurement validity.

Concurrence looks at how a measure relates to a gold standard. If, as frequently occurs, there isn’t one, the next best is the correlation with other established measures. This assumes that the latter are themselves valid, which may not be true, and risks stifling innovation, a source of concern if a paper is criticized on this ground. More straightforwardly, concurrence also means that a test ...

Performance Analysis of Three Likelihood Measures for Color Image Processing

Image segmentation is a low–level operation, concerned with partitioning an image into homogeneous regions. In a large number of applications, segmentation plays a fundamental role for the subsequent higher–level operations; such as recognition, object–based image/video compression, object tracking, scene analysis, and object–based image editing. Until recently, attention was focused on segment...

Simplified calculations using likelihood ratios.

Turbofan Engine Performance under Reliability Measures Approach

In this paper, the authors investigated the various factors, which can affect the performance of a turbofan engine. For this, the various subunits of a turbofan engine like inlet duct, compressor, combustion chamber, liner, turbine, exhaust nozzle etc. are investigated to find its various reliability characteristics through Markov process and supplementary variable technique (SVT). The main adv...

The trouble with likelihood ratios.

ity scale for clinicians is symmetrically skewed in both directions. In primary care, elective surgery, and oncology, clinicians work at the extremes of the probability scale. The time has come to apply the Feynman-Tufte principle to clinical logic, to offer a visual representation of Bayesian logic. Earlier attempts with natural logarithmics do not allow a simple graphic. We teach a scale of l...