Effect of repeated measure (e.g. time) on a single variable

[deleted_user]

Hi,

I would like to know the best way to test if a given variable within a single group is affected by time. For example, if one measures the weight of a group of mouse throughout their life, time is expected to have a significant effect on their weight. In contrast, the height of buildings might not be affected by time (well until they are demolished eventually).

I initially thought about using a one-way ANOVA on the different time-point values but my feeling is that I am loosing a lot of power in doing so (because the ANOVA is doing all the possible comparisons). I saw that repeated measures ANOVA might give the information I am looking for (via the Univariate Tests of Hypotheses for Within Subject Effects) but I would like this to be restricted to a single group.

Thanks for your input,

Christian

[statsplank]

Hi Christian,

You can do stratified analysis of time effect i.e. repeated measures ANOVA on the single group data (BY group processing).

[deleted_user]

Thanks a lot!