The phrase "about the effectiveness or" is correct and usable in written English.
It can be used when discussing or questioning the effectiveness of a particular method, strategy, or concept.
Example: "The research paper focuses on the debate about the effectiveness or impact of various teaching methods on student learning."
Alternatives: "regarding the efficacy of" or "concerning the effectiveness of".
Our three recommendations derive from the science, including logical inferences based on empirical information about the effectiveness or ineffectiveness of specific past policy approaches.
A debate has broken out among some Democratic officials about the effectiveness — or wisdom — of running such pointedly negative advertisements with five weeks remaining in the campaign.
A spokeswoman for the Department for Business said on Tuesday that no controls were placed on the export of the fake devices until 2010 because there was "no concrete evidence about the effectiveness or otherwise of these devices.
Then it announced, bizarrely, in a formal response to a written question: "It was never intended, and the county council never suggested, that it would use this initiative to draw conclusions about the effectiveness or otherwise of using fish oil to boost exam results". This was, once again, untrue.
While there are still questions about the effectiveness or implementation of the plan, it is undoubtedly moving India from a cash-based society to one that relies on digital banking and money transfer.
The categories were small — a few thousand people total — but the fact that they existed for official targeting (and in turn, revenue for Facebook) rather than being flagged raises questions about the effectiveness — or even existence — of hate speech controls on the platform.
Therefore, no recommendation could be made about the effectiveness, benefit or harmfulness of seclusion or restraint based on scientific evidence.
The result is a feature that will be studied for years to come, not just for Bigelow's filmmaking prowess (the third-act raid on bin Laden's compound in particular), but because what the film says about the effectiveness -- or ineffectiveness -- of torture.
One can argue all day about the effectiveness of meditation or mindfulness or one can try it and see for oneself.
Regarding the perceptions on effectiveness of influenza vaccines (Question 5 of Table 3), market workers were more likely to have a negative perception about the effectiveness of avian or human influenza vaccines to protect against human infection with AIVs (OR: 0.30, 95 % CI: 0.17 0.50).
The concept of patient safety in dentistry is in its infancy, with little knowledge about the effectiveness of tools or interventions developed to improve patient safety or to minimise the occurrence of adverse events.
