Clearly, if a social norms campaign does not reach very much of its intended audience, then its potential effectiveness decreases.

The effectiveness of the traditional 'interrupt and repeat' model of advertising is decreasing.

But this is the simple truth: As the pain in his back increases, his effectiveness decreases.

As the effectiveness of the laser decreases with increasing light levels, it is likely to be most effective at dawn and dusk.

They state that the effectiveness of current vaccines "decreases with increasing age" and in patients with other illnesses.

It has worked well in most cases, but believe the effectiveness wears off or decreases after time.

The pitch's effectiveness also decreases substantially if it cannot be thrown accurately for strikes.

The agency also said the effectiveness of the method decreases in women who weigh more than 155 pounds.

How does the effectiveness of sequestration compare to decreasing the "carbon intensity" of our activities?

Unfortunately, the effectiveness of Diatomaceous earth decreases the if it is wet.