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It might make a good item for his next column.
The result shows that the valid instrument has "excellent" item reliability of 0.97 logit and "good" item separation of +5.37 logit (ítem strata of 7.49).
These studies resulted in a nine-item scale that demonstrated good item characteristics as well as acceptable internal consistency reliability, construct validity, and predictive validity.
Greg Sargent had a good item yesterday on the question of whether Democrats will support marriage equality in their 2012 platform.
The three subscales exhibited high internal-consistency reliability, good item- and model-fit, good test information functions, and expected patterns of intercorrelations and associations with neuroticism, sex, and race/ethnicity.
Good item.
Similar(8)
Regarding the psychometric investigations, the PIPS showed good item-analytic properties.
Good item-scale correlations were obtained, with Pearson's correlation coefficient ranging from 0.56 0.84.
As regards the scale internal consistency, the correlations of single items and the referring scale ranged from 0.56 to 0.84, indicating good item-scale correlations.
Data skewness was not a problem even though two symptoms showed floor effect and the symptoms showed good item-total correlation to the symptom scale [ 30].
Studies showed that its internal consistency in non-psychiatric and psychiatric samples was adequate with good item-total correlations and good test retest reliability [ 34- 36].
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com