The FAI has not been scientifically demonstrated to be a valid measurement of free testosterone in men:

Most of us feel that it's not a valid measurement.

-frequency characteristic that is designed to allow subjectively valid measurement of noise.

A valid measurement of total productivity necessitates considering all production inputs, and the surplus value calculation is the only calculation to conform to the requirement.

Statistically valid measurements require even and representative samples.

Results from this study demonstrate that questionnaires can be used as a valid measurement to show differences in the behavioral inhibition systems of different types of people.

In broadcasting and audio equipment measurements 468-weighting is the preferred weighting to use because it was specifically devised to allow subjectively valid measurements on noise, rather than pure tones.

In the course of conducting research, we can never know with absolute certainty whether we have achieved valid measurement of variables.

The measure has been found by some to be a reliable and valid measurement of male arousal.

The first valid measurement was actually made in 1963, but the field began to expand only after a low-noise technique was developed in 1970.