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  1. C

    Compare regression coefficients

    Hi all, I have two independent measures of my dependent variable. I hypothesized that one of the two is better in prediction the dependent variable. Let’s imagine that I would have measured the height of a bottle with (a) a ruler and (b) just my hand span. I want to be able to say that a...
  2. C

    Compare means from two parallel tests

    Hi, My goal is to measure environmental attitude (EA). To do that I want to construct a scale and use a Rasch model to estimate item and person scores. My study design is the following. 1. I want to measure EA as a base 2. I want to introduce a cognitive dissonance intervention (or control...