The phrase "actual effectiveness" is correct and usable in written English.
You can use it when discussing the real or true impact or results of something, often in contrast to perceived or theoretical effectiveness.
Example: "The study aimed to measure the actual effectiveness of the new teaching method compared to traditional approaches."
Alternatives: "real effectiveness" or "true effectiveness".
This includes scrutiny, security of people's data, cost, the effects on business, unacknowledged technological difficulties and actual effectiveness as a tool to make the public safe.
The current meta-analysis clearly suggests that this assumption is wrong: target group members' ideas about effective behaviour change methods do not translate into actual effectiveness, at least not when it concerns threatening communication.
So expansion creates organizations that are, whatever their actual effectiveness, structurally arational.
We've already seen what happens to hospital systems if we focus on outcome measures instead of actual effectiveness.
"The actual effectiveness of taping and taking of signals from opponents — it is something done widely in many sports.
Contraceptive methods vary considerably in their theoretical effectiveness and in their actual effectiveness in use ("use-effectiveness").
The most pressing is the need for better information about (1) the likely effectiveness of programs before they are launched, and (2) their actual effectiveness in the past.
The protections of the refugee convention are only words, Ghezelbash argued, and their actual effectiveness is shaped with the actions of the states who implement it.
Both aspects imply that real savings are lower than accredited savings, querying the policy instrument's actual effectiveness and efficiency.
Their actual effectiveness depends on their capability to provide realistic engineering estimates without arbitrary adjustment of model parameters.
Surprisingly little is known, too, about the actual effectiveness of the many types of intervention aimed at controlling antibiotic resistance.
