|
Size: 827
Comment: Clarification
|
← Revision 10 as of 2026-02-17 15:46:13 ⇥
Size: 847
Comment: Links
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 3: | Line 3: |
| The '''Sobel test''' is a test for [[Statistics/MediationAnalysis|mediation]]. | The '''Sobel test''' is a test for [[Statistics/Mediator|mediation]]. |
| Line 13: | Line 13: |
| The hypothesis is formulated such that the relationship between an independent and dependent variable is an '''indirect effect''' through a '''mediator variable'''. | The hypothesis is formulated such that the association between an independent and dependent variable is an '''indirect effect''' through a [[Statistics/Mediator|mediator]]. |
| Line 21: | Line 21: |
| The current practice is to instead use a bootstrapping method to estimate the variance of ''β,,2,,β,,3,,''. | The current practice is to instead use a bootstrapping method to estimate the [[Statistics/Variance|variance]] of ''β,,2,,β,,3,,''. |
| Line 23: | Line 23: |
| The calculated test statistic is then compared to a [[Statistics/TestStatistic|critical value]] from either a [[Statistics/NormalDistribution#Standard_Normal_Distribution|Z]] or [[Statistic/StudentsTDistribution|t distribution]]. | The calculated test statistic is then compared to a [[Statistics/TestStatistic|critical value]] from either a [[Analysis/NormalDistribution#Standard_Normal_Distribution|Z]] or [[Analysis/StudentsTDistribution|t distribution]]. |
Sobel Test
The Sobel test is a test for mediation.
Contents
Description
The hypothesis is formulated such that the association between an independent and dependent variable is an indirect effect through a mediator.
In these pictured terms, the Sobel test statistic is calculated as:
The current practice is to instead use a bootstrapping method to estimate the variance of β2β3.
The calculated test statistic is then compared to a critical value from either a Z or t distribution.