A moderating variable is a factor that influences or changes the relationship between two other variables. It alters the strength or direction of the relationship between the two main variables. Full definition
When peer rejection has been analyzed as moderating variables significant associations emerged between low math and verbal self - concepts, respectively, and high risk of behavioral problems. (frontiersin.org)
Potential moderating variables included age and gender, generalized stress response and illness — related coping strategies, beliefs of control, perceived social support, personality factors, expressed emotion and life stressors. (link.springer.com)
1:42 P.M. Capt. Smith, Titanic: Have had moderate variable winds and clear fine weather since leaving. (scientificamerican.com)