I don’t believe the nature study results presented there. The MMSE is such a basic test that it is almost impossible to score less than full marks unless you are cognitively impaired. I’ve run through it hundreds of times with patients. The other tests are more cognitively demanding. Looking at the Table 1 of that nature study, there appears as if there would be a significant difference in the distribution of ages - couple extra older people in one of the study groups. I think this is a false positive result