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o_guest's profile
Olivia Guest | Ολίβια Γκεστ
Olivia Guest | Ολίβια Γκεστ
Olivia Guest | Ολίβια Γκεστ
@o_guest

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Olivia Guest | Ολίβια Γκεστ

@o_guest

• goth gremlin • computational cognitive/neuroscience modeling • geek & techish Cypriot • plant aficionada • came up with #bropenscience • http://neuroplausible.com  •

Τότεναμ, Λονδίνο & Cyprus
olivia.science
Joined October 2015

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    1. neuroconscience‏ @neuroconscience 1 Feb 2017
      • Report Tweet

      neuroconscience Retweeted Chris Gorgolewski

      if so, then why can we 'peak' at our BFs as part of standard pre-registration procotol? #confusedhttps://twitter.com/ChrisFiloG/status/826785233102106627 …

      neuroconscience added,

      Chris Gorgolewski @chrisgorgo
      Replying to @neuroconscience @nickwan
      I beg to differ. The bigger the correlation matrix is the higher chances of getting at least one cell with BF>3
      5 replies 1 retweet 0 likes
    2. neuroconscience‏ @neuroconscience 1 Feb 2017
      • Report Tweet
      Replying to @neuroconscience

      peek even :(

      1 reply 1 retweet 2 likes
    3. Chris Gorgolewski‏ @chrisgorgo 1 Feb 2017
      • Report Tweet
      Replying to @neuroconscience

      I'm not sure what do you mean by "peeking" in context of preregistration.

      1 reply 1 retweet 0 likes
    4. neuroconscience‏ @neuroconscience 1 Feb 2017
      • Report Tweet
      Replying to @chrisgorgo

      recalculate BF after every participant, stop data collection when exceeds preregistered BF.

      4 replies 1 retweet 0 likes
    5. ActionPredictionLab‏ @actpredictlab 1 Feb 2017
      • Report Tweet
      Replying to @neuroconscience

      this is allowed? Can you point to reference (when you get some time)?

      2 replies 1 retweet 0 likes
    6. Chris Chambers‏Verified account @chrisdc77 1 Feb 2017
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      Replying to @actpredictlab @neuroconscience

      Yes e.g. https://www.ncbi.nlm.nih.gov/pubmed/24659049  and http://www.lifesci.sussex.ac.uk/home/Zoltan_Dienes/Dienes%202011%20Bayes.pdf …

      1 reply 1 retweet 5 likes
    7. ActionPredictionLab‏ @actpredictlab 1 Feb 2017
      • Report Tweet
      Replying to @chrisdc77 @neuroconscience

      thank you!

      1 reply 1 retweet 2 likes
    8. Chris Chambers‏Verified account @chrisdc77 1 Feb 2017
      • Report Tweet
      Replying to @actpredictlab @neuroconscience

      Optional stopping is one of the great selling points of Bayesian hyp testing. Max efficiency!

      1 reply 2 retweets 3 likes
      Olivia Guest | Ολίβια Γκεστ‏ @o_guest 1 Feb 2017
      • Report Tweet
      Replying to @chrisdc77 @actpredictlab @neuroconscience

      I always assumed that renders prereg moot tho? Isn't it primarily to curb p-hacking?

      7:18 AM - 1 Feb 2017
      • 1 Retweet
      • 1 Like
      • neuroconscience Marc Casañas Escarré
      1 reply 1 retweet 1 like
        1. New conversation
        2. Chris Chambers‏Verified account @chrisdc77 1 Feb 2017
          • Report Tweet
          Replying to @o_guest @actpredictlab @neuroconscience

          No b/c opt stopping (under freq model) is just one of several forms of bias / p-hacking

          2 replies 1 retweet 1 like
        3. Olivia Guest | Ολίβια Γκεστ‏ @o_guest 1 Feb 2017
          • Report Tweet
          Replying to @chrisdc77 @actpredictlab @neuroconscience

          I mean if you use Bayes...

          1 reply 1 retweet 0 likes
        4. Chris Chambers‏Verified account @chrisdc77 1 Feb 2017
          • Report Tweet
          Replying to @o_guest @actpredictlab @neuroconscience

          Bayes is just as susceptible to oth forms of researcher bias that prereg also prevents

          1 reply 1 retweet 4 likes
        5. Tim van der Zee‏ @Research_Tim 1 Feb 2017
          • Report Tweet
          Replying to @chrisdc77 @o_guest and

          Optional stopping *does* affect BF & para estimation http://www.timvanderzee.com/sequential-sampling-with-bayes-factors-effects-on-error-rates-and-parameter-bias/ …

          2 replies 7 retweets 9 likes
        6. Tim van der Zee‏ @Research_Tim 1 Feb 2017
          • Report Tweet
          Replying to @Research_Tim @chrisdc77 and

          Better alternative is using Cred Int width for seq sampling

          1 reply 1 retweet 1 like
        7. Tim van der Zee‏ @Research_Tim 1 Feb 2017
          • Report Tweet
          Replying to @Research_Tim @chrisdc77 and

          And keep number of peeks low; always introduces bias, afaik.

          1 reply 1 retweet 0 likes
        8. Chris Chambers‏Verified account @chrisdc77 1 Feb 2017
          • Report Tweet
          Replying to @Research_Tim @o_guest and

          I don't think so but I'll defer to experts -> @JeffRouder @richarddmorey

          2 replies 1 retweet 0 likes
        9. 8 more replies

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