Gentile, B., Reimer, R. A., Nath, D., & Walsh, D. A. (2017). Assessing the effects of violent video games on children: A review of the evidence. Journal of Applied Developmental Psychology, 56, 294-305.
The relationship between Katya and Tanya is not a narrative. It is a ritual. And by the final shot—Tanya alone at the table, Katya passed out in the bedroom, the camera slowly racking focus to a fly on a dirty plate—you realize there is no moral. There is only the loop. DAU. Katya Tanya
DAU. Katya Tanya: Subjectivity, Power, and the Staged Reality of Soviet Life Gentile, B
While Ilya Khrzhanovsky is the primary creator, Jekaterina Oertel (often credited as Katya Oertel) served as a key co-director and makeup designer for many of the films, including this one. If you're looking for more specific information, Information on where to stream or watch the film? (2017)
[Wide Shot] The two women stand over a table. Between them is a strange, spinning metal device (a gyroscope or a lens). Katya: "Science requires objectivity. You are contaminating the variable with your empathy." Tanya: (Leans in close to the device) "And you are sterilizing the human soul. Look at him."
Specifically, the title you provided refers to a specific installment within the series.