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If a moderator variable moderated the relation between the independent variable and the dependent variable in...

If a moderator variable moderated the relation between the independent variable and the dependent variable in a study, how does the p-value change? If the p-value when the moderator is present is larger, does that mean the moderator variable weakened or strengthened the relationship between the independent variable and dependent variable?

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Answer #1

The p-value changes with the significance of the relationship between dependent and independent variables. Higher p-value indicates weaker relationship and lower p-value indicates stronger relationship. If a moderator variable moderated the relationship between the dependent and independent variable, then the p-value will increase.

If the p-value is larger in presence of the moderator variable, that means the moderator variable weakened the relationship between the independent and dependent variable.

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