The theory included many predictions that could be empirically tested.
Every step in the analysis can be logically and empirically tested.
However, the validity and reliability of the test has a whole have not yet been empirically tested.
Until recently, this typology has been used without being empirically tested.
Moreover, some of these extensions have been also tested empirically.
Theoretically there should be no differences, but the theories have not been tested empirically.
It is important to note that this information could only have been empirically tested using a computational approach.
The natural sciences provided the only reliable source of knowledge because it could be tested empirically.
It makes predictions that are approximately correct when tested empirically.
First, it has only been empirically tested with displays composed of one or two elements.