Indices with data bound between -1 and +1


New Member
Hi all,

I would really appreciate some advice on how to deal with my data.

I would like to compare data calculated from an index which is bounded by -1 and +1.

I was surprised to see that previously published use of this index has been analysed using standard ANOVA, because I was led to believe that data bound like this should be treated as percentage type data and analysed using a GLM with a different kind of error structure.

Any advice or links to some reading much appreciated.

Thank you!

Link to paper showing details of index