Results 11 to 20 of about 1,100,257 (311)

A Pedagogic Demonstration of Attenuation of Correlation Due to Measurement Error [PDF]

open access: yesSpreadsheets in Education, 2014
Measurement error is an inescapable reality in most domains of research. Incidental variation in experimental setting, participant motivation and mood are among the multitude of factors that introduce error into measurement.
Christopher R Fisher
doaj   +1 more source

The Assumption of a Reliable Instrument and Other Pitfalls to Avoid When Considering the Reliability of Data

open access: yesFrontiers in Psychology, 2012
The purpose of this article is to help researchers avoid common pitfalls associated with reliability including incorrectly assuming that (a) measurement error always attenuates observed score correlations, (b) different sources of measurement error are ...
Kim eNimon   +2 more
doaj   +1 more source

Mid-infrared autocollimation for linear motion error measurement

open access: yesMeasurement: Sensors, 2021
It is known that linear motion errors for linear guides can be measured by the autocollimation method. In this case, it is necessary to install a mirror on the measurement target.
Hiraku Matsukuma   +4 more
doaj   +1 more source

Error modeling and analysis of alternating measurement mode roadheader positioning system

open access: yesGong-kuang zidonghua, 2022
The alternating measurement mode roadheader positioning technology will produce cumulative measurement error in the process of multiple alternating measurement, which will affect the positioning precision of roadheader.
LI Zhihai   +4 more
doaj   +1 more source

Some recent advances in measurement error models and methods [PDF]

open access: yes, 2005
Measurement errors, error in variables, misclassification, efficiency comparison, survival analysis. JEL C13, C20, C24, C25,
Augustin, Thomas   +3 more
core   +1 more source

Lateral velocity measurement and error analysis

open access: yesThe Journal of Engineering, 2019
Most existing velocity measurement methods can only calculate the radial velocity by Doppler effect. Here, the authors study the method of measuring the lateral velocity.
Mengye Qiang, Yechao Bai, Xinggan Zhang
doaj   +1 more source

Design of variable frequency dual transponder system for fixed point ranging

open access: yesElectronics Letters, 2023
Aiming at the problems of high system cost, complex ranging process, low ranging accuracy, and limited measurement distance in commonly used methods for ground fixed point distance measurement journals, a variable frequency microwave ranging system based
Guo Xiaoxu   +3 more
doaj   +1 more source

Uncertainty evaluation of multilateration-based geometric error measurement considering the repeatibility of positioning of the machine tool [PDF]

open access: yesMetrology and Measurement Systems, 2023
The sequential multilateration principle is often adopted in geometric error measurement of CNC machine tools. To identify the geometric errors, a single laser tracker is placed at different positions to measure the length between the target point and ...
Xingbao Liu, Yangqiu Xia, Xiaoting Rui
doaj   +1 more source

Measurement Error in Retrospective Work Histories

open access: yesSurvey Research Methods, 2014
Measurement error in retrospective reports of work status has been difficult to quantify in the past. Issues of confidentiality have made access to datasets linking survey responses to a valid administrative source very problematic.
Jose Pina Sánchez   +2 more
doaj   +1 more source

Regression calibration for Cox regression under heteroscedastic measurement error - Determining risk factors of cardiovascular diseases from error-prone nutritional replication data [PDF]

open access: yes, 2003
For instance nutritional data are often subject to severe measurement error, and an adequate adjustment of the estimators is indispensable to avoid deceptive conclusions.
Augustin, Thomas   +2 more
core   +1 more source

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