Meta-analyses of love scales: Do various love scales measure the same psychological constructs?

Two statistical meta-analyses synthesized 33 empirical studies which investigated the correlation between relationship satisfaction and two types of love: Erotic Love and Companionate Love, measured by various love scales based on four major theories by Rubin, Lee, Hatfield, and Sternberg. The results drawn by the Hunter-Schmidt method showed that satisfaction was highly correlated with Erotic Love, but that its correlation with Companionate Love was unclear due to heterogeneity in the total sample of the all Companionate Love studies. A moderator analysis indicated a potential moderator, that is, theoretical differences between Lee's Color Theory of Love and the other three theories. The result suggested that a Companionate Love named Storge in the Color Theory should not be mixed up with other friendship-style loves defined by other theories as the Storge subscale would measure a different psychological construct.