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How can 'blind' participant be so if intervention can be perceived

Discussion in 'Biomechanics, Sports and Foot orthoses' started by markjohconley, Feb 13, 2018.

  1. markjohconley

    markjohconley Well-Known Member


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    If the intervention involves a foot orthoses how can the intervention group participant be 'blind' if they can perceive a difference in surface topography of material which has resistance to deformation relative to before intervention whilst the control participant would possibly perceive no difference from the 'so-called' sham orthoses?
     
  2. Craig Payne

    Craig Payne Moderator

    Articles:
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    Yes; that is a problem. But you try to blind them by spinning as much "bullshit" as possible so they think that they are not in the placebo group.
    You give the same spiel to both groups.
     
  3. markjohconley

    markjohconley Well-Known Member

    thanks craig
     
  4. Griff

    Griff Moderator

    The best way this was described to me was to imagine if someone from your experimental group was sitting next to someone from your control group out in the waiting room, and they were chatting about their participation in your study. Think about the obvious things they could discuss which would alert them to which group they were in - and start there when you design your study.
     
  5. Dieter Fellner

    Dieter Fellner Well-Known Member

    The 'scientific method' of inquiry is very problematic for investigation of orthoses etc. That likely will never change.
     
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