Brain implants for mood disorders tested in people

Two DARPA-funded teams are testing brain implants for the treatment of mood disorders in humans.

From Nature News:

electrical engineer Omid Sani of [USC] ... showed the first map of how mood is encoded in the brain over time. He and his colleagues worked with six people with epilepsy who had implanted electrodes, tracking their brain activity and moods in detail over the course of one to three weeks. By comparing the two types of information, the researchers could create an algorithm to ‘decode’ that person’s changing moods from their brain activity.

I find that "decode" is often used instead of the world "correlate" (I noticed this first in writeups on Jack Gallant's work).

"Decoding" implies a level of certainty or ground truth that "correlating" does not.