The phrase "alter the validity of" is correct and usable in written English.
It can be used in contexts where you want to discuss changing or affecting the legitimacy or truth of something.
Example: "The new evidence may alter the validity of the previous findings in the study."
Alternatives: "change the legitimacy of" or "affect the authenticity of".
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.
This observation does not alter the validity of the results because the aim of this study is to highlight the differences between 60 SDB atopic children and 50 SDB nonatopic children.
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].
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.
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.
