The PORPUS was designed to be a utility instrument (PORPUS-U), but it can also be used as a psychometric instrument (PORPUS-P) [ 11, 12].
Perception of health care quality was assessed using a psychometric scale which was developed in a theoretically driven way.
Parental attitudes towards and beliefs about child oral health care were measured using a psychometric instrument developed by Pine et al. (2004) [ 7].
Cognitive evaluation was performed using a psychometric battery comprised of the WMS-III logical memory subtest, a 10-item word list recall task, digit span forward and reversed, category fluency, Boston Naming Test (first 30 items), trail making (A & B; total time and errors), digit symbol, and clock draw and copy.
The sample size (n = 132) may be criticised to be a bit small but according to Clark and Watson, the sample size to be used in psychometric test of an index depends on the number of items in the index.
In accordance with the proposal by Clark and Watson, the number of items in an instrument determines the sample size to be used in the psychometric testing.
In this study the Dutch version of the MPOC-SP will be used, with good psychometric properties [ 58, 59].
This evidence can be used alongside quantitative psychometric evidence on the performance of measures in different groups.
In this study the Dutch version of the MPOC will be used, with good psychometric properties [ 57].
This meta-analysis has shown that CFF is a diagnostically accurate test, which could be used as an adjunct to conventional psychometric test batteries, such as PHES, but could only become a replacement screening test if further studies show an improvement in sensitivity.
