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In the SNS-FEM formulation, a stable item which contains the gradient variance items is constructed without any uncertain parameter to strengthen the system stiffness.
These items together successfully operationalized functional ability in DMD, with excellent targeting and reliability (Person Separation Index: 0.95; Cronbach's α: 0.93), stable item locations, and good fit to the Rasch model (mean person/item fit residual: −0.21/−0.44, SD: 0.32/1.28).
Conditional maximum likelihood estimation methods will be used to obtain stable item parameters.
According to Linacre (1994) a sample size of n = 250 is sufficient to achieve stable item parameters.
The DIF observed was marginal thus providing preliminary evidence of stable item performance across administration methods; suggesting PU-QOL scales could be measured on a common metric.
Previous Rasch modeling of the PF-10 indicated that the items form a unidimensional, hierarchical continuum with stable item difficulty estimates across diverse patient groups [ 24, 30].
Similar(52)
There are no stable items, or no items with stable properties.
They implicitly rely on the intuition that there are stable items with stable properties.
In the Theaetetus, the world dissolves into radical flux: there are no stable items with stable properties that we both refer to.
With the help of stable items (e.g., date of entry), a matching method will indicate highly similar cases.
It has been used as a screening method for identifying stable items for IRT linking and DIF procedures [ 18, 32].
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CEO of Professional Science Editing for Scientists @ prosciediting.com