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Title: Validation of the Short Version (TLS-15) of the Triangular Love Scale (TLS-45) across 37 Languages.
Author: Kowal M, Sorokowski P, Dinić BM, Pisanski K, Gjoneska B, Frederick DA, Pfuhl G, Milfont TL, Bode A, Aguilar L, García FE, Roberts SC, Abad-Villaverde B, Kavčič T, Miroshnik KG, Ndukaihe ILG, Šafárová K, Valentova JV, Aavik T, Blackburn AM, Çetinkaya H, Duyar I, Guemaz F, Ishii T, Kačmár P, Natividade JC, Nussinson R, Omar-Fauzee MSB, Pacquing MCT, Ponnet K, Wang AH, Yoo G, Amin R, Pirtskhalava E, Afhami R, Arvanitis A, Duyar DA, Besson T, Boussena M, Can S, Can AR, Carneiro J, Castro R, Chubinidze D, Čunichina K, Don Y, Dural S, Etchezahar E, Fekih-Romdhane F, Frackowiak T, Moharrampour NG, Yepes TG, Grassini S, Jovic M, Kertechian KS, Khan F, Kobylarek A, Križanić V, Lins S, Mandzyk T, Manunta E, Martinac Dorčić T, Muthu KN, Najmussaqib A, Otterbring T, Park JH, Pavela Banai I, Perun M, Reyes MES, Röer JP, Şahin A, Sahli FZ, Šakan D, Singh S, Smojver-Azic S, Söylemez S, Spasovski O, Studzinska A, Toplu-Demirtas E, Urbanek A, Volkodav T, Wlodarczyk A, Yaakob MFMY, Yusof MR, Zumárraga-Espinosa M, Zupančič M, Sternberg RJ.
Journal: Arch Sex Behav; 2024 Feb; 53(2):839-857. PubMed ID: 37884798.
Abstract:
Love is a phenomenon that occurs across the world and affects many aspects of human life, including the choice of, and process of bonding with, a romantic partner. Thus, developing a reliable and valid measure of love experiences is crucial. One of the most popular tools to quantify love is Sternberg's 45-item Triangular Love Scale (TLS-45), which measures three love components: intimacy, passion, and commitment. However, our literature review reveals that most studies (64%) use a broad variety of shortened versions of the TLS-45. Here, aiming to achieve scientific consensus and improve the reliability, comparability, and generalizability of results across studies, we developed a short version of the scale-the TLS-15-comprised of 15 items with 5-point, rather than 9-point, response scales. In Study 1 (N = 7,332), we re-analyzed secondary data from a large-scale multinational study that validated the original TLS-45 to establish whether the scale could be truncated. In Study 2 (N = 307), we provided evidence for the three-factor structure of the TLS-15 and its reliability. Study 3 (N = 413) confirmed convergent validity and test-retest stability of the TLS-15. Study 4 (N = 60,311) presented a large-scale validation across 37 linguistic versions of the TLS-15 on a cross-cultural sample spanning every continent of the globe. The overall results provide support for the reliability, validity, and cross-cultural invariance of the TLS-15, which can be used as a measure of love components-either separately or jointly as a three-factor measure.

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