What are the deductive and inductive parts of this “After a year, brain scans showed that among the walkers, the hippocampus had increased in volume by about 2 percent on average; in the others, it had declined by about 1.4 percent. Since such a decline is normal in older adults, ’a 2 percent increase is fairly significant,’ said the lead author, Kirk Erickson, a psychologist at the University of Pittsburgh. Both groups also improved on a test of spatial memory, but the walkers improved more the. While it is hard to generalize from this study to other populations, the researchers were delighted to learn that hippocampus might expand with exercise” (Span, 2011).
