Chunk #16 — Demonstrations — Example 1: Effect sizes of smoking quantity and nicotine dependence within assessment waves

Source

A Practical Guide to Calculating Cohen's f(2), a Measure of Local Effect Size, from PROC MIXED.

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First, RAB2is calculated for smoking quantity at the baseline wave. This involves finding VAB and Vnull. To find VAB, a multiple regression model is run at the baseline wave: