The phrase "at improving the validity" is correct and usable in written English.
It can be used when discussing efforts or actions aimed at enhancing the accuracy or credibility of something, such as research or data.
Example: "The team is focused on strategies at improving the validity of their findings through rigorous testing."
Alternatives: "in enhancing the validity" or "for boosting the validity".
Most of this research has been aimed directly or indirectly at improving the validity of cost-effectiveness outcomes.
Some dimensional approaches have been proposed aimed at improving the validity and reliability of psychiatric disorder assessments, especially in conditions with high rates of comorbidity such as BD and Eating Disorder (ED).
Based on the notion that using one single assessment method can compromise the reliability, validity, impact on learning, and other quality criteria of assessment [ 4], Van der Vleuten and Schuwirth proposed a holistic, programmatic approach to assessment aimed at improving the validity and reliability of measurements and documentation of competency development [ 5].
The emphasis for strengthening HMIS needs to fall on improving the validity of HMIS indicators and increasing the use of this data for improving programme performance at the ground level.
Collecting qualitative data to improve PNC questions was extremely useful in understanding and improving the validity of PNC indicators.
The more complex random effect structure was chosen to resemble more closely the analysis at the individual level and to improve the validity of the inference [ 18].
In addition, the longitudinal nature of this study, with measures of relationship style at baseline with subsequent death data, improves the validity of the results as compared with cross-sectional data.
To improve the validity of anthropometric measures, all children were weighed at school at the same time of day (7 30 – 8:50 am) and in the same relation to their eating time (before morning break).
Following patients over one year made it possible to improve the validity of the final diagnosis compared to the diagnosis reached at the end of the first encounter.
To improve the validity of the data, we filtered the compounds that were assayed on fewer than 30 samples and also the compounds whose efficacy could not be measured at the assayed concentrations in over 50% of the assayed samples.
