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Mediator Variables  

Matthew S. Fritz and Houston F. Lester

Mediator variables are variables that lie between the cause and effect in a causal chain. In other words, mediator variables are the mechanisms through which change in one variable causes ... More

Moderator Variables  

Matthew S. Fritz and Ann M. Arthur

Moderation occurs when the magnitude and/or direction of the relation between two variables depend on the value of a third variable called a moderator variable. Moderator variables are ... More

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