The phrase "alter the validity" is correct and usable in written English.
It can be used in contexts where you are discussing changes to the legitimacy or truthfulness of something, such as a document, argument, or claim.
Example: "The new evidence presented in court could potentially alter the validity of the previous ruling."
Alternatives: "change the legitimacy" or "modify the authenticity."
45 However, each of these requires independent validation, as it is known that even comparatively minor adaptations alter the validity of a tool and accuracy of responses.
We concluded that recent consumption as encoded by the dietary recall questionnaire in conjunction with lipid levels did not alter the validity of the associations of the 5 environmental factors found.
Thus, the local context of care may significantly alter the validity of administrative data results for primary care performance.
Furthermore, although artefacts could potentially have influenced the observed correlation between fitness and genetic diversity, they do not alter the validity of our conclusions.
Importantly, differences among the indications for antifungal treatment did not appear to alter the validity of the association of the infecting organism that was isolated with the development of renal dysfunction.
It is a well known problem that moving a questionnaire concept from one population to another might alter the validity and other characteristics, which were found appropriate for the original population, on which the questionnaire was developed [ 5].
Sedation and paralysis may affect the transmission of pleural pressure through the esophageal wall altering the validity of the positive pressure occlusion test compared with the "Baydur" test [21].
This is inherent of an analogy task, and altering this sequence would have engaged other cognitive processes and altered the validity of inferences.
The response rate is unlikely to have altered the validity of the conclusions which are similar to one study in an ophthalmology clinic [ 4] but dissimilar to another [ 3].
Although this may limit our ability to generalize results to the broader U.S. population, it does not alter the internal validity of our results.
Nevertheless, removal of items from any scale, for example in the present analysis on the basis of IIO, can alter the construct validity of the scale composed of the remaining items and full psychometric testing of any instrument newly derived by these methods is necessary.
