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Sobel Test

The Sobel test is a test for mediation.

Contents

  1. Sobel Test
    1. Description

Description

The hypothesis is formulated such that the relationship between an independent and dependent variable is an indirect effect through a mediator variable.

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In these pictured terms, the Sobel test statistic is calculated as:

t = β2*β3 / SE2,3 = β2*β3 / (sqrt(β22*σ32 + β32*σ22))

The current practice is to instead use a bootstrapping method to estimate the variance of β2*β,,3,.

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Statistics/SobelTest (last edited 2025-04-03 21:56:14 by DominicRicottone)