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I am trying to test a mediational model via multiple regression, to see
of the beta for the relationship between X and Y is significantly
reduced by covarying A. I need to test for significant differences
between the beta X -> Y without A in the equation, and with A in the
equation.
These don't strike me as independent betas. Are they? I have skimmed
through several regression texts, such as Cohen & Cohen and Pedhazur, as
well as reading baron & Kenny's 1986 J Personality and SSocial Psych
article. I cannot find a formula for testing differences between a
particular regression weight in successive regression models.
Any help is much appreciated!
jason
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Content-Description: Card for Jason Osborne, Ph.D.
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