Reliabilities with Ordered Response Categories Items

2020 ◽  
Author(s):  
Seohyun Kim ◽  
Zhenqiu (Laura) Lu ◽  
Allan Cohen
Keyword(s):  
Ordered Response

Modified Mixed Generalized Ordered Response Model to Handle Misclassification in Injury Severity Data

2018 ◽  
Vol 2672 (30) ◽  
pp. 53-63 ◽  
Author(s):  
Lacramioara Balan ◽  
Rajesh Paleti
Keyword(s):  
Injury Severity ◽  
Random Variable ◽  
Parameter Estimates ◽  
Discrete Random Variable ◽  
Response Models ◽  
Ordinal Response ◽  
Proposed Model ◽  
Misclassification Errors ◽  
Misclassification Rates ◽  
Ordered Response

Traditional crash databases that record police-reported injury severity data are prone to misclassification errors. Ignoring these errors in discrete ordered response models used for analyzing injury severity can lead to biased and inconsistent parameter estimates. In this study, a mixed generalized ordered response (MGOR) model that quantifies misclassification rates in the injury severity variable and adjusts the bias in parameter estimates associated with misclassification was developed. The proposed model does this by considering the observed injury severity outcome as a realization from a discrete random variable that depends on true latent injury severity that is unobservable to the analyst. The model was used to analyze misclassification rates in police-reported injury severity in the 2014 General Estimates System (GES) data. The model found that only 68.23% and 62.75% of possible and non-incapacitating injuries were correctly recorded in the GES data. Moreover, comparative analysis with the MGOR model that ignores misclassification not only has lower data fit but also considerable bias in both the parameter and elasticity estimates. The model developed in this study can be used to analyze misclassification errors in ordinal response variables in other empirical contexts.

scholarly journals Structural validity of the Boston Carpal Tunnel Questionnaire and its short version, the 6-Item CTS symptoms scale: a Rasch analysis one year after surgery

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Juhani Multanen ◽  
Jari Ylinen ◽  
Teemu Karjalainen ◽  
Joona Ikonen ◽  
Arja Häkkinen ◽  
...  
Keyword(s):  
Carpal Tunnel Syndrome ◽  
Differential Item Functioning ◽  
Carpal Tunnel ◽  
Response Category ◽  
Structural Validity ◽  
Item Functioning ◽  
Boston Carpal Tunnel Questionnaire ◽  
Tunnel Syndrome ◽  
Ordered Response ◽  
Carpal Tunnel Questionnaire

Abstract Background The Boston Carpal Tunnel Questionnaire (BCTQ) and its shorter version, the Six-Item Carpal Tunnel Symptoms Scale (CTS-6), are widely used for assessing function and/or symptoms in patients with carpal tunnel syndrome. This study examined the structural validity of the BCTQ and CTS-6 among patients who had undergone surgery for treatment of carpal tunnel syndrome. Methods The data for this cross-sectional analysis were obtained from 217 adult patients who had undergone carpal tunnel release surgery 1 year earlier. All patients completed the CTS-6, Symptom Severity Scale (SSS) and Functional Status Scale (FSS) of the BCTQ at 12 months after surgery. The Rasch Measurement Theory (RMT) was applied to investigate the unidimensionality, residual correlation, differential item functioning, scale coverage/targeting, and person separation of the CTS-6, SSS and FSS of the BCTQ. Results The FSS showed unidimensionality and good scale and item fit. All items showed ordered response category thresholds. Eight of the FSS items displayed differential item functioning favoring age or gender. The multidimensional structure of the CTS-6 was absorbed by creating a testlet for frequency of symptoms or testlets for pain and numbness. The testlets supported unidimensionality in the BCTQ SSS. One item in the CTS-6 and two items in the BCTQ SSS showed differential item functioning favoring age or gender. Four items in the BCTQ SSS and two items in the CTS-6 exhibited disordered response category thresholds. Merging of the relevant response categories led to ordered response category thresholds. The person separation indices were 0.73, 0.86 and 0.77 for the CTS-6, BCTQ SSS and FSS, respectively. Conclusions Based on the RMT analysis, the CTS-6 has superior psychometric properties compared to the BCTQ SSS in surgically treated patients. The CTS-6 might be more accurate when separated into item sets measuring pain or numbness. The FSS of the BCTQ has acceptable construct validity, although gender differences at some ages were observed in responses.

scholarly journals A Simulative Approach to Electron Conduction in Thick-Film Resistors

1983 ◽  
Vol 10 (2-3) ◽  
pp. 103-110 ◽  
Author(s):  
C. Jacoboni ◽  
M. Prudenziati ◽  
A. Rizzi
Keyword(s):  
Thick Film ◽  
External Force ◽  
Electrical Transport ◽  
Localized States ◽  
Electron Conduction ◽  
Ordered Response ◽  
Metallic Grains

A simulative approach to the calculation of electrical transport in thick-film resistors is presented, in which electrons are considered to hop from and to metallic grains and localized states in the glass. For concentrations of metallic grains sufficiently low and of localized states sufficiently high, a maximum in conductivity as a function of temperature is obtained due to a balance between the tendency of temperature to favour hopping and to oppose an ordered response to an external force.

On a Name Change for the Journal

1986 ◽  
Vol 18 (1) ◽  
pp. 161-168
Author(s):  
J. E. Epperson ◽  
C. L. Huang ◽  
T. T. Fu ◽  
S. M. Fletcher
Keyword(s):  
Agricultural Economics ◽  
General View ◽  
Response Model ◽  
High Quality ◽  
Name Change ◽  
High Quality Journal ◽  
Ordered Response ◽  
Ordered Response Model

AbstractMembership of the Southern Agricultural Economics Association (SAEA) was polled to ascertain the strength of support for changing the name of the Southern Journal of Agricultural Economics (SJAE) to eliminate the regional connotation. The general view was that a name change is unwarranted. The overall impression of our profession is that the SJAE is a high quality journal and that the name is not the crucial factor in promulgating this image but rather the continued striving for excellence. A number of profiles were developed to show that the ordered-response model may be used in predicting probabilities for those who would or would not likely favor a name change.

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