A most crucial concern in selecting additional dependent variables to compare to an outcome variable of interest is to be sure that these additional variables will

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The purpose of selecting additional dependent variables is to see if the program or intervention had an impact on other related variables, but those variables should not be influenced by the program itself. If those variables are influenced by the program, it may not be clear whether the program had an impact on the outcome variable or if the impact was due to the influence of the program on the additional variables. Therefore, the best choice is to select variables that are not affected by the program.

A Most Crucial Concern in Selecting Additional Dependent Variables to Compare