Similarity has effects on starting a relationship by initial attraction to know each other. It is showed that high attitude similarity resulted in a significant increase in initial attraction to the target person and high attitude dissimilarity resulted in a decrease of initial attraction (Gutkin, Gridley & Wendt, 1976; Kaplan & Olczak, 1971). Besides, similarity also promotes relationship commitment. Study on heterosexual dating couples found that similarity in intrinsic values of the couple was linked to relationship commitment and stability (Kurdek & Schnopp-Wyatt, 1997).

आकर्षण =मैत्री आणि स्नेह
सारखेपणा किंवा पूरकतेचे आंतरव्यक्ति आकर्षणावरील परिणाम Effects of similarity on interpersonal attraction
सारखेपणा किंवा पूरकता Similarity or complementarity?
समिपता/सानिध्य परिणाम Propinquity effect