Huh.
From MIT's Technology Review, July 30:
Big tech firms are trying to read people’s thoughts, and no one’s ready for the consequences.
In 2017, Facebook announced that it wanted to create a headband that would let people type at a speed of 100 words per minute, just by thinking. 
Now,
 a little over two years later, the social-media giant is revealing that
 it has been financing extensive university research on human 
volunteers.
Today,
 some of that research was described in a scientific paper from the 
University of California, San Francisco, where researchers have been 
developing “speech decoders” able to determine what people are trying to
 say by analyzing their brain signals.
The research is 
important because it could help show whether a wearable brain-control 
device is feasible and because it is an early example of a giant tech 
company being involved in getting hold of data directly from people’s 
minds.
To
 some neuro-ethicists, that means we are going to need some rules, and 
fast, about how brain data is collected, stored, and used.
In the report
 published today in Nature Communications, UCSF researchers led by 
neuroscientist Edward Chang used sheets of electrodes, called ECoG 
arrays, that were placed directly on the brains of volunteers. 
The
 scientists were able to listen in in real time as three subjects heard 
questions read from a list and spoke simple answers. One question was 
“From 0 to 10, how much pain are you in?” The system was able to detect 
both the question and the response of 0 to 10 far better than chance. 
Another
 question asked was which musical instrument they preferred, and the 
volunteers were able to answer “piano” and “violin.” The volunteers were
 undergoing brain surgery for epilepsy.
Facebook
 says the research project is ongoing, and that is it now funding UCSF 
in efforts to try to restore the ability to communicate to a disabled 
person with a speech impairment.
Eventually,
 Facebook wants to create a wearable headset that lets users control 
music or interact in virtual reality using their thoughts.
To
 that end, Facebook has also been funding work on systems that listen in
 on the brain from outside the skull, using fiber optics or lasers to 
measure changes in blood flow, similar to an MRI machine.
Such
 blood-flow patterns represent only a small part of what’s going on in 
the brain, but they could be enough to distinguish between a limited set
 of commands.
“Being
 able to recognize even a handful of imagined commands, like ‘home,’ 
‘select,’ and ‘delete,’ would provide entirely new ways of interacting 
with today's VR systems—and tomorrow's AR glasses,” Facebook wrote in a blog post.... 
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