Validation of the Short Version (TLS-15) of the Triangular Love Scale (TLS-45) across 37 Languages

Marta Kowal*, Piotr Sorokowski, Bojana M. Dinić, Katarzyna Pisanski, Biljana Gjoneska, David A. Frederick, Gerit Pfuhl, Taciano L. Milfont, Adam Bode, Leonardo Aguilar, Felipe E. García, S. Craig Roberts, Beatriz Abad-Villaverde, Tina Kavčič, Kirill G. Miroshnik, Izuchukwu L.G. Ndukaihe, Katarína Šafárová, Jaroslava V. Valentova, Toivo Aavik, Angélique M. BlackburnHakan Çetinkaya, Izzet Duyar, Farida Guemaz, Tatsunori Ishii, Pavol Kačmár, Jean C. Natividade, Ravit Nussinson, Mohd Sofian B. Omar-Fauzee, Ma Criselda T. Pacquing, Koen Ponnet, Austin H. Wang, Gyesook Yoo, Rizwana Amin, Ekaterine Pirtskhalava, Reza Afhami, Alexios Arvanitis, Derya Atamturk Duyar, Théo Besson, Mahmoud Boussena, Seda Can, Ali R. Can, João Carneiro, Rita Castro, Dimitri Chubinidze, Ksenija Čunichina, Yahya Don, Seda Dural, Edgardo Etchezahar, Feten Fekih-Romdhane, Tomasz Frackowiak, Nasim Ghahraman Moharrampour, Talía Gómez Yepes, Simone Grassini, Marija Jovic, Kevin S. Kertechian, Farah Khan, Aleksander Kobylarek, Valerija Križanić, Samuel Lins, Tetyana Mandzyk, Efisio Manunta, Tamara Martinac Dorčić, Kavitha N. Muthu, Arooj Najmussaqib, Tobias Otterbring, Ju Hee Park, Irena Pavela Banai, Mariia Perun, Marc Eric S. Reyes, Jan P. Röer, Ayşegül Şahin, Fatima Zahra Sahli, Dušana Šakan, Sangeeta Singh, Sanja Smojver-Azic, Sinem Söylemez, Ognen Spasovski, Anna Studzinska, Ezgi Toplu-Demirtas, Arkadiusz Urbanek, Tatiana Volkodav, Anna Wlodarczyk, Mohd Faiz Mohd Y. Yaakob, Mat Rahimi Yusof, Marcos Zumárraga-Espinosa, Maja Zupančič, Robert J. Sternberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

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.

Original languageEnglish
JournalArchives of Sexual Behavior
DOIs
Publication statusAccepted/In press - 2023

Keywords

  • Cross-cultural
  • Triangular Love Scale
  • Triangular theory of love

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