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Stats Chap 10
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- 1Grand Mean CentringMeans the transformation of a variable by taking each score and subtracting the mean of all scores (for the variable) from it.
- 2Direct EffectThe effect of a predictor variable on an outcome variables when a mediator is present in the model
- 3Index of MediationA standardized measure of an indirect effect. In a mediation model, it is the indirect effect multiplied by the ratio of the standard deviation of the predictor variable to the standard deviation of the outcome variable.
- 4Indirect EffectThe effect of a predictor variable on an outcome variables through a mediator.
- 5Interaction EffectThe combined effect of two or more predictor variables on an outcome variable. It can be used to gauge moderation.
- 6MediationPerfect mediation occurs when the relationship between a predictor variables and an outcome variable can be completely explained by their relationships with a third variables. For example, taking a dog to work reduces work stress. This relationship is mediated by positive mood if (1) having a dog at work increases positive mood; (2) positive mood reduces work stress; and (3) the relationship between having a dog at work and work stress is reduced to zero (or at least weakened) when positive mood is included in the model.
- 7MediatorA variable that reduces the size and/or direction of the relationship between a predictor variable and an outcome variable (ideally to zero) and is associated statistically with both.
- 8ModerationOccurs when the relationship between two variables changes as a functions of a third variable. For example, the relationship between watching horror films (predictors) and feeling scared at bedtime (outcome) might increase as a function of how vivd an imagination a person has (moderator).
- 9ModeratorA variable that changes the size and/or direction of the relationship between two other variables.
- 10Simple Slopes AnalysisAn analysis that looks at the relationship (i.e., the sample regression) between a predictor variable and an outcome variable at low, mean and high levels of a third (moderator) variable.
- 11Sobel TestA significant test of mediation. It tests whether the relationship between a predictor variables and an outcome variable is significantly reduced when a mediator is included in the model. It tests the indirect effect of the predictor on the outcome.
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- Psychology Fichas sobre Stats Chap 10, creado por Sarah Church el 08/10/2016.
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- Sarah Church
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