Hi Bruce, Thanks very much for your advice. It was very helpful.
Bruce Weaver <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > On 26 Feb 2003, Judith wrote: > > > Hi, > > I fed 16 subjects three different meals one of which was a control on > > three seperate days and measured their folate concentrations at 7 time > > points on each study day. I did a repeated measures anova in SPSS 10.0 > > using treatment and time as my within subject variables. However I > > can't seem to generate contrasts at individaul time points or post hoc > > analysis. Could anyone tell me if there is an optimal way to enter the > > data into SPSS to allow me to do these analysis? > > Hi Judith, > The consensus nowadays is that the usual array of multpile > comparision procedures are not appropriate for repeated measures designs. > The ususal suggestion for repeated measures is to use paired t-tests (with > the error term coming only from the pair of treatments going into the > contrast), and applying a Bonferroni correction. I'm sure you can find > lots of old posts on this at Google Groups. I bet Rich Ulrich's FAQ also > has a good summary. You can find it here: > > http://www.pitt.edu/~wpilib/index.html > > Cheers, . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
