The phrase "add validity" is correct and usable in written English.
It can be used when discussing the process of making something more credible or acceptable, often in the context of research or arguments.
Example: "To strengthen our findings, we need to add validity to our methodology by incorporating peer reviews."
Alternatives: "enhance credibility" or "increase legitimacy."
Critical incidents not only add validity to ordinary ratings, but they also suggest behavioral details that might be promising predictors of success on the job, response to psychiatric treatment, or level of academic achievement.
The use of Howard's chart will provide a relevant reference point for replication of the study and add validity to the experiment.
The theorisation and inclusion of these dynamics can add validity and precision to some of the broader, yet more rigid and spatially limited explanatory frameworks.
Developing a 'strong' LSP performance measure, as informed by applied linguistic theory and practice, and involving ethnographic studies, analyses of the authentic exchanges and SME input into a revised scorecard, is argued to add validity to this tool.
This technique can add validity and reliability to data collection while 'enlarging' the remembering [ 57].
Greater understanding of those mechanisms could add validity regarding the existence of the supplier-induced demand phenomenon.
Of note, one of the studies Critchley and Critchley [ 23] re-categorised as satisfactory was validating echocardiography against thermodilution, adding validity to the reference standard used in the current study.
We find that published experimental data (for which the porosity and crystal fraction is known) correlate well with our modelled curves, adding validity to our approach.
Based on this division into "architectural communities" and the prevalence of bridging ties, interfaces generated by the addition of a new subsystem can be faithfully integrated into the existing architecture, adding validity to our growth mechanism.
Propelled by frustration, the opposition's resorting to arms would probably serve the interests of the government, adding validity to its otherwise specious contention that it faces an armed insurgency financed from abroad and driven by the most militant Islamists.
In addition, you cannot change a single word of a testimonial, which adds validity.
