Intra-rater reliability

About: Intra-rater reliability is a research topic. Over the lifetime, 2073 publications have been published within this topic receiving 140968 citations.

Reliability modeling of electricity transmission systems: An adaptation of traditional reliability methods

Abstract: For power industry systems, reliability is related to the ability of the system to provide an adequate supply of electrical energy [2-5]. However, reliability related measures are fundamentally different to those used in traditional reliability practice. System reliability is related to the probability that a product/service will operate properly for a specified period of time under the design operating conditions without failure [1]. In standard reliability theory, this probabilistic perspective has been generally used to model and analyze the reliability of a product/service. Reliability related measures such as availability, mean time to failure, importance measures, etc. are also based on such probabilistic perspective. When considering electric power system reliability, researchers and analysts are interested in how component outages and repair rates affect the associated overall system rates. Primary interest is devoted to the quantification of system failures; this quantification is then translated to expected system outage rates, mean outage duration and overall downtime.

Review of reliability and factors affecting the reliability

Abstract: A reliable and valid measure is required for measuring the abstract characteristics. The reliability of the measures are affected by the length of the scale, definition of the items, homogeneity of the groups, duration of the scale, objectivity in scoring, the conditions of measuring, the explanation of the scale, the characteristics of the items in scale, difficulty of scale, and reliability estimation method. Those factors must be known and taken into account to construct a reliable scale.

Intra- and Inter-Rater Reliability of Thickness Measurement of the Psoas Major Muscle Using the Spring Gauge Technique for the Consistent Inward Pressures on Healthy Subjects: An Ultrasonographic Study

Abstract: The purpose of the current study was to determine the intra- and inter-rater reliability of muscle thickness (MT) measurement of the psoas major (PM) using ultrasonography (US) conducted at different inward pressures of approximately .5 kg, 1.0 kg, 1.5 kg, and 2.0 kg. Twelve healthy male subjects were recruited for the study. The thicknesses of both PMs of each subject were measured by two different examiners in a random manner to assess the intra- and inter-rater reliability. The measurement values were analyzed using the intra-class correlation coefficient (ICC) with a 95% confidence interval (CI). ICC (2,1) was used to determine the inter-rater reliability and ICC (3,1) was used to assess the intra-rater reliability of the MT measurement of the PM. The results indicated higher ICC values for intra-rater reliability compared to inter-rater reliability. In addition, the value for intra-rater reliability with .5 kg inward pressure [ICC=.99 (95%CI=.98~.99)] was higher compared to 1.0 kg, 1.5 kg, and 2.0 kg. Other inward pressures for intra- and inter-rater reliability in current study were also demonstrated to have excellent values (ICC=.94~.99). These findings showed that maintaining consistent inward pressure is essential for maintaining reliability of the results when the MT of the PM is measured by different examiners in a clinical setting.