Marta KowalPiotr SorokowskiBojana M. DinićKatarzyna PisanskiBiljana GjoneskaDavid A. FrederickGerit PfuhlTaciano L. MilfontAdam BodeLeonardo A. Aguilar2025-10-06202400040002, 157328000004-00021573-280010.1007/s10508-023-02702-7https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174942530&doi=10.1007%2Fs10508-023-02702-7&partnerID=40&md5=892a69972c04419a3c4f0aa892b82193https://gcris.yasar.edu.tr/handle/123456789/8245Love 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 = 7332) 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 = 60311) 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. © 2024 Elsevier B.V. All rights reserved.EnglishCross-cultural, Triangular Love Scale, Triangular Theory Of Love, Article, Consensus, Convergent Validity, Human, Human Experiment, Language, Multicenter Study (topic), Reliability, Systematic Review, Love, Psychometry, Questionnaire, Reproducibility, Sexual Behavior, Sexuality, Humans, Language, Love, Psychometrics, Reproducibility Of Results, Sexual Behavior, Sexual Partners, Surveys And Questionnairesarticle, consensus, convergent validity, human, human experiment, language, multicenter study (topic), reliability, systematic review, love, psychometry, questionnaire, reproducibility, sexual behavior, sexuality, Humans, Language, Love, Psychometrics, Reproducibility of Results, Sexual Behavior, Sexual Partners, Surveys and QuestionnairesArticle