did this in 1997. The two other most obvious problems with Sternberg's theory of love are as follows. The first is the question of the separate nature of the levels of love. The second is a question of the measures that have been used to assess the three levels of love. These problems with the theory continued to be studied, for example by Lomas (2018). In a large-scale cross-cultural study published in the Journal of Sex Research in 2020, the cultural universality of the theory was supported. See also Carte de Tendre Love styles Lovemap Neuroanatomy of intimacy Psychological theories of love Scientific models of love Romantic friendship Theories of love References External links Interpersonal attraction Philosophy of love Psychological theories