Re: [R] Proportion test in three-chices experiment

From: NOEL Yvonnick <>
Date: Mon 18 Jul 2005 - 21:34:11 EST


when testing binomial hypotheses with both repeated measures and inter-group factors, you should make explicit your model on the intra-subject part of the data. You can't do Chi-square comparisons on count data that mix independent and dependent measures.

But you can define a Bernoulli logistic model at the individual single response level, and define a proper subject factor, and a stimulus-type factor, and possibly an item factor (nested within the stimulus-type category). This may be viewed as a Rasch model of measurement.

Within this model, coefficient estimates on the subject factor are measures of individual ability that can be a posteriori introduced in an ANOVA. In some cases, you can model the intra-subject part of the data as a temporal model, assuming for instance that subjects are getting more efficient as time goes on.

HTH, Yvonnick. mailing list PLEASE do read the posting guide! Received on Mon Jul 18 21:40:02 2005

This archive was generated by hypermail 2.1.8 : Fri 03 Mar 2006 - 03:33:46 EST