efficacious, effective, efficacy. A.I. Made These Movies Sharper. Critics Say It Ruined Them.

A.I. Made These Movies Sharper. Critics Say It Ruined Them.

Machine-learning technologies are being used in film restoration for new home video releases. But some viewers strongly dislike the results.

It's no immediate cure, but Pfizer's 90% vaccine efficacy in trials is encouraging news.

Two Johns Hopkins epidemiologists assess what this means and what remains unknown:

A HIV vaccine has shown 100% effectiveness in humans. It's now allowed to progress to the next stage of testing.

Johnson & Johnson Announces 'Large-Scale Efficacy Testing of the HIV Vaccine in Humans'

“You have my promise that all of us at Johnson & Johnson will not rest until we defeat HIV.”

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"After the earthquake, which had destroyed three-quarters of Lisbon, the country's wise men had found no more efficacious means of preventing total ruin than to give the people a fine auto-da-fé." — Candide, by Voltaire



Theorists have examined the value of repetition for hard sell versus soft sell messages to determine their relative efficacy. Frank Kardes and others have concluded that a soft sell with an inferred conclusion rather than an overt hard sell can often be more persuasive.

talk

Informal. To be efficacious: Money talks.

ef·fi·ca·cious (ĕf'ĭ-kā'shəs)

adj.
Producing or capable of producing a desired effect. See synonyms at effective.
having the power to produce a desired effect efficacious remedy>


efficacious ways of rejuvenating the mind that I have ever discovered>

[From Latin efficāx, efficāc-, from efficere, to effect. See effect.]

efficaciously ef'fi·ca'cious·ly adv.
efficaciousness ef'fi·ca'cious·ness n.

ef·fi·ca·cy

noun \ˈe-fi-kə-sē\

plural ef·fi·ca·cies

Definition of EFFICACY

: the power to produce an effect

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Examples of EFFICACY

1. efficacy of the alarms in actually preventing auto theft;
2. In the planner's view, Rumsfeld had two goals: to demonstrate the efficacy of precision bombing and to “do the war on the cheap.” —Seymour M. Hersh, New Yorker, 7 Apr. 2003