A regression model was derived using a response surface methodology through performing the 416B model of hybrid central composite design.
ii) Composite health scores derived using item response theory (IRT) parameter estimates in Winsteps®, a Rasch measurement software package.
Health status scores were derived using Item Response Theory (IRT) parameter estimates in Winsteps, a Rasch measurement software.
This general health score was derived using item response theory (IRT) parameter estimates in Winsteps, a Rasch measurement software package (http://www.winsteps.com).
19 23 24 The algorithm was derived using multinomial response mapping, validated internally and externally using the 2000 US Medical Expenditure Panel Survey (MEPS), generating index values for eight countries: the UK, the USA, Spain, Germany, the Netherlands, Denmark, Japan and Zimbabwe.
The PROMIS item banks were derived using item response theory (IRT) and developed through a rigorous process of literature review, focus groups across multiple diseases and sites, cognitive assessments, and expert consultation.
Uttaro et al (1999) 20-Item version was derived using item-response theory.
Risk aversion was estimated using a well-established approach commonly used in behavioral economics studies in which the index of risk aversion is derived using participants' responses on all 10 risk aversion questions [ 1, 7, 13].
The apparent mass and the head vibration transmission responses were derived using two different frequency response function estimators based upon the cross- and auto-spectral densities of the response and excitation signals, denoted as H1 and Hv estimators, respectively.
