PS395 Lecture 7: Mediation Test Notes

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9 Mar 2017
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Why: through the (cid:862)hardy(cid:863) traits a(cid:271)ility to i(cid:374)(cid:272)rease self-esteem, it decreases how much discrimination is perceived. Paths (cid:271), (cid:272)": = b1x1 + b2x2: for path a, we find the slope of b1, how much do both x and m predict y, outcome. Path b comes from b1 = relationship between m and y, controlling for x. Path (cid:272)" = (cid:271)2 = relationship between x and y, controlling for m. If (cid:272) (cid:449)as sig(cid:374)ifi(cid:272)a(cid:374)t, (cid:271)ut it"s (cid:449)iped out (cid:449)he(cid:374) the (cid:373)ediator is partialled out (cid:894)(cid:272)" = (cid:374). s. (cid:895), the(cid:374) the mediator fully mediated/explained the simple relationship between the predictor and outcome. If (cid:272) (cid:449)as sig(cid:374)ifi(cid:272)a(cid:374)t, (cid:271)ut it"s stre(cid:374)gth is redu(cid:272)ed (cid:449)he(cid:374) the (cid:373)ediator is partialled out (cid:894)(cid:272)" (cid:449)ill (cid:271)e less than c, but can still be significant), the mediator partially mediates/explains that simple relationship between predictor and outcome. Indirect effect ab = . 133 (a x b) Direct effect a: simple regression predicting depression from stress b1.

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