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math_rachel's profile
Rachel Thomas
Rachel Thomas
Rachel Thomas
@math_rachel

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Rachel Thomas

@math_rachel

co-founder http://fast.ai , professor of practice @QUTDataScience | machine learning, data, ethics, algorithmic harms, math PhD (she/her)

Brisbane, Australia
rachel.fast.ai
Joined May 2013

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    1. Rachel Thomas‏ @math_rachel 1 Aug 2019

      "Nearly all of the largest manufacturers of wearable heart rate trackers [e.g. Fitbit, Samsung watch, etc.] rely on technology that could be less reliable for consumers who have darker skin" https://www.statnews.com/2019/07/24/fitbit-accuracy-dark-skin/ … h/t @datasocietypic.twitter.com/P3fWFH00Sr

      Nearly all consumer devices that track heart rate rely on optical sensors that continuously monitor the volume of your blood. In between beats, there is less blood volume at your wrist, and therefore more light that is reflected back to the sensor. But not all devices rely on the same kind of light.

Fitbits, Samsung watches, and several other brands rely on only green lights. These lights are simpler and cheaper to
      5 replies 63 retweets 113 likes
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      Rachel Thomas‏ @math_rachel 1 Aug 2019

      The inaccuracy of Fitbits & other heart rate trackers on people with dark skin is particularly concerning given that Fitbits are currently being used in over 300 clinical medical research trials, most of which do not take skin tone into account. https://www.statnews.com/2019/07/24/fitbit-accuracy-dark-skin/ …pic.twitter.com/XWTcK8gGnS

      Accuracy issues could also mean that an increasingly robust field of research into heart rates doesn’t accurately reflect the heart rate information for certain individuals. Although numerous companies do indicate on their websites that their devices are not medically accurate, Fitbits are currently used in almost 300 clinical trials. Stanford University researchers also recently concluded the widely publicized “Appl
      2:37 PM - 1 Aug 2019
      • 105 Retweets
      • 131 Likes
      • Marianne Milton Aaron Penne lindsey __insecurity princess__ 🌈💖🔥 farid anvari unerrable rightness of tsering Hazel Fizz jaynuary blues Judy Stone
      4 replies 105 retweets 131 likes
        1. New conversation
        2. Rachel Thomas‏ @math_rachel 1 Aug 2019

          21% of large employers who offer health insurance are already collecting information from their employees’ wearable devices.pic.twitter.com/EnzVCM5GDf

          Already, big-name companies like IBM and Target offer trackers as part of wellness programs, and there are signs that employers may be beginning to make wellness programs — many of which include these trackers — mandatory. At one point, the West Virginia school system wanted to require teachers to wear them. Yale, too, was sued just this month over a program that would have charged anyone who didn’t participate in it
          5 replies 0 retweets 14 likes
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        3. Rachel Thomas‏ @math_rachel 1 Aug 2019

          Rachel Thomas Retweeted Rumman Chowdhury

          This is a great point from @ruchowdh about wrist size and whether fitness trackers have been tested on a comprehensive set of body sizes & types:https://twitter.com/ruchowdh/status/1157041884574834688?s=20 …

          Rachel Thomas added,

          Rumman Chowdhury @ruchowdh
          Replying to @math_rachel @datasociety
          I've also wondered about wrist size - most of these trackers don't fit my small wrist properly. While I can't really verify, I am pretty sure it's not measuring me properly. Did they test these on smaller people/women?
          1 reply 0 retweets 10 likes
          Show this thread
        4. End of conversation
        1. Jeff C. Ho‏ @JeffCFHo 1 Aug 2019
          Replying to @math_rachel @BecomingDataSci @datasociety

          @timalthoff

          0 replies 0 retweets 0 likes
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        1. America, you're in danger girl‏ @OverUnderClover 13 May 2020
          Replying to @math_rachel @datasociety

          Wow I did NOT know this thank you!

          0 replies 0 retweets 0 likes
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        1. Carina C. Zona‏ @cczona 13 May 2020
          Replying to @math_rachel @datasociety

          .@EmilyGorcenski has demonstrated for years that fitness trackers are unacceptable for clinical/medical/science use. e.g. fitness tracker "detected" heartbeat in a chicken breast filet. Conditioning lives, livelihood, & privacy on wrongly-presumed reliability will be devastating.

          0 replies 0 retweets 0 likes
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