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.

Inter and Intra-rater Reliability and Validity of an instrument made in rural set up to measure Maximum Inspiratory Pressure termed as Dhiraj Maximum Inspiratory Pressure Device

Abstract: Background: Maximum Inspiratory Pressure (MIP) measures inspiratory force generated by respiratory muscles. MIP is measured with non-invasive pressure transducer device which has mouthpiece, pressure gauge, and dial showing readings. Respiratory muscle weakness is a common sign depicted in conditions like neuromuscular disorders, cardiovascular disease, and other respiratory pathologies which affect the individual’s lung volume and capacity. The devices available in the market to measure the MIP are costly. Aim: This study was undertaken to find out inter-rater and intra-rater reliability and validity of therapist made instrument in rural set up to measure maximum inspiratory pressure (DMIPD). Method: This cross-sectional study was carried out in 40 normal healthy individuals without lung diseases were recruited as per inclusion criteria. MIP values were noted by two raters using the DMIPD and were then compared between two rater values to that of the gold standard values. Validity and reliability were calculated using interclass correlation coefficients (ICC) and p-value. Result: Statistical analysis for inter-rater reliability by Kappa using SPSS 1.000 showing almost perfect agreement as per Kappa interpretation also for intra-rater analysis an ICC value of 0.96 depicting excellent validity and Cronbach alpha value of 0.97 thereby proving it to have excellent reliability. Conclusion: We conclude that DMIPD has excellent reliability and validity.

The Reliability of Thickness Measurement of the Deep Fiber of the Lumbar Multifidus Using Ultrasonography

Abstract: The reliability of the thickness measurement of the lumbar multifidus (LMD using real-time ultrasonography (US) was determined in only the superficial fiber of the lumbar multifidus (SM). However, previous studies have not examined the reliability of the deep fiber of the LM (DM). The purpose of this study was to determine the intrarater and the interrater reliability of the thickness measurements of DM using US. Eleven heathy males participated in the study. The thickness of the DM was measured with an US in the prone position. Reliability was examined using intraclass correlation coefficients (ICC), standard error of the measurement (SEM), and the Bland and Altman plot. ICC(3,1) was used to calculate the interrater reliability of the thickness measurement of DM using the values from both the first and second test sessions. Additionally, ICC(3,1) was used to calculate the intrarater reliability of the measurements over two days using the measurements obtained in test session 1 and lest session 2. The results of this study were as follows: 1) the ICC(3,1) value for interrater reliability was .94 in the first test session, and .93 in the second test session. 2) the ICC(3,1) values for intrarater reliability of the measurements over two days was .90 in both the first examiner and the second examiner. The interrater reliability and interrater reliability of the DM measurements, obtained via the US protocol used in this research was excellent. Therefore, we conclude that the thickness measurement of the DM obtaioned from the US protocol used in this research would be useful for clinician assessment of the thickness of the DM.

Estimation of life and Reliability of Electronic Product

Abstract: Presently, the market not only requires the fault free parts but also requires delivered product to work safely and failure free i.e. reliably. So for prevention of failure of product in between manufacturing stage to final usage stage, we need to do reliability as well as performance testing.Development in the electronic system i.e. VLSI and embedded system using component like FPGA, CPLD increases the reliability issue. So for reducing the reliability issue required to understand root causes of failure which causes failure in the field and further their minimization. Some traditional approaches like MIL-217 are used for reliability prediction but these type of approaches having some limitations like, it does not consider the load profiles, no provisions for root cause of component failure, the consideration of base failure rate and other unclear modifying factors.Prognostics and health management approach (PHM) consider the life cycle loading of the electronic system with its actual working conditions, which is the better tool for reliability predictions. This approach mainly relies on extensively Highly Accelerated Life Testing (HALT). This paper gives an idea about the reliability prediction approach.

Eye tracking to assess concussions: an intra-rater reliability study with healthy youth and adult athletes of selected contact and collision team sports

Abstract: Eye movements that are dependent on cognition hold promise in assessing sports-related concussions but research on reliability of eye tracking measurements in athletic cohorts is very limited. This observational test–retest study aimed to establish whether eye tracking technology is a reliable tool for assessing sports-related concussions in youth and adult athletes partaking in contact and collision team sports. Forty-three youth (15.4 ± 2.2 years) and 27 adult (22.2 ± 2.9 years) Rugby Union and soccer players completed the study. Eye movements were recorded using SMIRED250mobile while participants completed a test battery twice, with a 1-week interval that included self-paced saccade (SPS), fixation stability, memory-guided sequence (MGS), smooth pursuit (SP), and antisaccades (AS) tasks. Intra-class correlation coefficient (ICC), measurement error (SEM) and smallest real difference (SRD) were calculated for 47 variables. Seventeen variables achieved an ICC > 0.50. In the adults, saccade count in SPS had good reliability (ICC = 0.86, SRD = 146.6 saccades). In the youth, the average blink duration in MGS had excellent reliability (ICC = 0.99, SRD = 59.4 ms); directional errors in AS tasks and gain of diagonal SP had good reliability (ICC = 0.78 and 0.77, SRD = 25.3 and 395.1%, respectively). Four metrics were found in this study to be reliable candidates for further biomarker validity research in contact and collision sport cohorts. Many variables failed to present a sufficient level of robustness for a practical diagnostic tool; possibly, because athletic cohorts have higher homogeneity, along with latent adverse effects of undetected concussions and repetitive head impacts. Since reliability of a measure can influence type II error, effect sizes, and confidence intervals, it is strongly advocated to conduct dedicated reliability evaluations prior to any validity studies.