Very few studies have examined the psychometric validity of the theoretically-derived cognitive errors supposedly measured by the CNCEQ, even though the instrument is frequently used to measure these cognitive errors.
To check the validity of these theoretically calculated profiles, we performed ARDRA on 60 strains of 27 different species and subspecies of the genus Mycoplasma.
Face and content validity of the qualitatively-derived and theoretically-based instrument were determined to be highly acceptable and relevant by lay and expert reviewers.
This loss of potential cases decreased the sample size but increased the internal validity of the study as only people with a theoretically 'new' diagnosis of dementia were included.
The validity of the relationship between heat and metabolism was demonstrated theoretically through the concept of thermal advancement and in experiments by the use of continuous cultures.
First, although the emerging body of empirical findings support the validity of the CU subscale in assessing these traits in a theoretically meaningful manner, the internal consistency of this subscale is rather low.
They allow a researcher to precisely define the theoretically relevant variables, and assess the reliability and validity of the measures.
Low correlation was expected between those dimensions that are theoretically unrelated constructs, thereby testing the discriminant validity of the instruments.
While this may theoretically have consequences for the precision and validity of the results, no one has shown this to be a practical problem for analyses of arthroplasty register data (Robertsson and Ranstam 2003, Lie et al. 2004).
The construct validity of the SSI was checked by Principal Component Analysis, which yielded 3 theoretically meaningful and coherent factors, only slightly different from the original ones, with good internal consistencies.
A 0.3% difference between the experimentally measured and theoretically calculated results has been found, demonstrating the validity of the proposed analysis method.
