Finally, the absence of a valid reference instrument in Arabic remains a major obstacle for the establishment of concurrent validity as well as predictive validity.
However, demonstrating construct validity of an instrument may not always support the establishment of predictive validity due to factors such as range restriction, where the relevant differences on the predictor or criterion are eliminated or minimized.
One of the great achievements of the 20th century was the establishment of the validity of the atomic hypothesis, first proposed in ancient times, that matter is made up of relatively few kinds of small, identical parts—namely, atoms.
The choice of measurement scale, increased variable content, establishment of face validity, and thorough experimental methods resulted in the ASDQ measuring the construct of automotive seating discomfort in a more comprehensive manner then previously developed industry questionnaires.
Such efforts, while substantial, represent the logical prerequisite to the establishment of content validity for the ICBM.
Development of the modified FT consisted of three phases: 1) discipline-specific modification, 2) development of new items, and 3) establishment of content validity.
The establishment of predictive validity for an animal model is very important for the purpose of establishing it as a useful tool to discover new treatments [ 4, 5].
We conducted this study in several steps: 1) development of a conceptual model; 2) generation of the item pool; 3) review of the items and establishment of content validity; 4) administration of the survey; and 5) psychometric structural evaluation.
Hence, while both assessments attempt to capture global health-related outcomes, the differing perceptions of the raters (clinicians versus clients) does seem to impact on the establishment of construct validity.
