A double dissociation for the two has not been found, therefore concluding they are not independent entities.

However not all memory tasks show this double dissociation, such as object recognition memory.

To make the difference between single and double dissociations easier to understand, Parkin gives the following example:

Further, a double dissociation between recollection and familiarity has been observed.

The "gold standard" for cognitive neuropsychology is the double dissociation.

Therefore, it is impossible to be fully confident that a given double dissociation actually exists.

Under the conditions illustrated in Figure 3.3 this system gives a double dissociation.

Comparisons must be made between animals, which will have inherent differences, so internal double dissociations are not possible.

These studies have also shown evidence for a double dissociation between voice recognition and voice discrimination.

A common way to demonstrate modularity is to find a double dissociation.