As with any scientific theory, empirical validation is needed, if we are to have any confidence in its predictive ability.

The project methodology is based on a combination of empirical validation, analytical verification and comparative analysis techniques.

A critical review of caffeine withdrawal: empirical validation of symptoms and signs, incidence, severity, and associated features.

The mathematical approach is used with the goal of deriving hypotheses that are more exact and thus yield stricter empirical validations.

We all have visions, Mr. Sowell says, and they are not dependent on empirical validation or logic.

Rationalists subscribe to positivism, the idea that scientific enquiry must rely upon empirical validation or falsification.

Thieblot and Haggard emphasise that these observations are made only on the basis of 'preliminary analysis' and do not offer any empirical validation.

First, the organizations identified programs for dissemination that were not part of the Follow Through experiment with no empirical validation.

Programs that had no empirical validation at all were recommended for dissemination along with the successful models.

To him, received baseball doctrine (managing "by the book") amounts to little more than a cobweb of prejudices crying out for objective empirical and statistical validation.