Yes, the paradigm shift in psychoanalysis over the past 120 years can be regarded as a move from one-person psychology toward two-person psychology.
Psychoanalysis started as a one-person psychology, with Sigmund Freud emphasizing the importance of the individual's unconscious conflicts, desires, and repressed memories. However, over time, psychoanalysts began to recognize the importance of the relationship between the analyst and the patient in the therapeutic process.
This led to the development of two-person psychology, which emphasizes the importance of the relationship between the analyst and the patient as an essential part of the therapeutic process. Two-person psychology emphasizes the interactive and co-constructed nature of the therapeutic relationship, rather than just focusing on the individual's internal psychological processes.
Overall, the shift towards two-person psychology represents an important development in psychoanalysis, and has led to a greater understanding of the role that the therapeutic relationship plays in promoting healing and growth.