
Comparisons Between Two Studies
One of the strengths (or at least potential strengths) of this two phase study is that we can compare results from these two different samples, taken several years apart. Are the findings “robust” with regard to consistency over time, as well as the sampling of different populations (at least minimal overlap in populations sampled). Following are comparisons between the two studies regarding both questions. We begin with the First Question and offer means and variances (as well as rankings) for both studies.

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