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In this approach, an observed score on instrument A is associated with an expected trait level and from this expectation an expected observed score on instrument B is estimated.
For well-behaved data sets, i.e. monotonic convergence with the expected observed order of grid convergence and no scatter in the data, the method reduces to the well known Grid Convergence Index.
If for some items, the expected observed item score differences can not be explained by differences on a latent level (because the observed differences are too small, or too large, given the difference in latent factor means between the samples), then these items are considered to be biased.
Japanese and Latino populations have been reported to have a lower than expected observed prevalence of cardiovascular disease when compared to Caucasian populations despite a similar, and in some cases increased, presence of established risk factors such as diabetes and hypertension.
The saturation effect is responsible for the deviation of some ribosomal proteins to lower than expected observed concentration values.
The frequencies of combinations of MC1R variants did not differ from expected observed allele frequencies (data not shown).
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Odds Ratio and ExpCount are the corresponding Odds Ratio and expect observed number.
E-O = expected-observed; ICU = intensive care unit.
Fig. 3. Crystalline silicate strengths expected for observed major features as a function of crystallinity ƒ̄c.
Comparing the expected and observed item characteristic curves indicated that the model fit the data acceptably (see sample items in Fig. 4, middle).
Comparing the expected and observed item characteristic curves showed that the model fit the data quite well (see sample items in Fig. 4, top).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com