Interesting. Should that ever be possible that would be an
   amazing achievement. I tend to think they'll use some standard
   psychological memory tests on animals they test with; boring
   regular memory tests. If it shows they have significantly better
   recall rate, then eventually they'll use that on human and do
   the same boring psychological testing procedures.

   Symbolic interpretation _might_ follow as an auxiliary line of
   research but I don't think it's required for an effective
   solution to memory problems or memory enhancement.
   Interpretation can be wholly external and ethically, it's likely
   that it will be.. for the most part; mostly because
   interpretation isn't necessary for effective deployment.