logistic regression question

Hi all,

I have an experimental design where subjects make a sequence of simple
binary choices A or B. I would like to test the hypothesis that
initially in the sequence subjects tend to choose A, but this bias
degrades to random (or perhaps a bias to B) as the sequence
progresses.

Initially I thought that maybe I could do a simple binary logistic
regression, with sequence position as the only covariate. But now I
think that this is probably invalid, because this would assume that
choices at sequence position t+1 are independent of choices at
sequence t. This assumption is plainly false because the choices are
made by the same individuals who may make runs of the same choice.

Can I solve this problem by including individual as a factor in the
model perhaps? Or is a more complicated solution necessary?

Thanks!

Ben
.

Relevant Pages

  • Re: logistic regression question
    ... initially in the sequence subjects tend to choose A, but this bias ... with sequence position as the only covariate. ...
    (sci.stat.edu)
  • Re: logistic regression question
    ... I have an experimental design where subjects make a sequence of simple ... with sequence position as the only covariate. ... supported would be to create convenient sized bins, ...
    (sci.stat.edu)
  • Re: logistic regression question
    ... I have an experimental design where subjects make a sequence of simple ... initially in the sequence subjects tend to choose A, but this bias ... with sequence position as the only covariate. ... You are looking at the choices as the sequence progresses. ...
    (sci.stat.edu)
  • Re: white noise generation
    ... will generate every possible bit pattern in a group of bits exactly once before repeating the sequence. ... All zeros is not a possible bit pattern, so there is a small bias that can be made evident by integration. ... A maximal-length N-bit LFSR will generate -1) bits before the sequence repeats. ... Since 2**N-1 is an odd number, there must always be more zeroes than ones or vice versa in the output, producing the small bias to which you referred. ...
    (comp.dsp)
  • Re: logistic regression question
    ... What I have ended up doing is dividing each individual's sequence into ... sequences are of different lengths. ... sequence position far more often than 5% of the time. ... This shouldn't result in a significant effect of ...
    (sci.stat.edu)
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