Psychometry
Psychometry evaluation consist of using statistical techniques, testing
the measurement properties of an instrument 5. There
are several measures to evaluate an instrument, the main ones being:
classical test theory (CTT) and modern test theory (MTT)5.
The classical test theory is the most widely used and known theory,
whose psychometric characteristics considered to be minimum
prerequisites are: scale structure, validity, reliability and
responsiveness 5,6.
Modern test theory consists of models, such as the item response theory
(IRT), which are innovative techniques for testing the psychometric
characteristics of an instrument 5.