Chaotic Dynamics in a Mathematical Model of Psychotherapy with Delayed Interaction Reaction.

Psychotherapy is a dynamic, two-person process involving the complex interplay between a client and therapist. Recent perspectives conceptualize psychotherapy as a complex dynamic system, integrating biological, psychological, and social factors. Research suggests that the psychotherapeutic process can be unpredictable, fluctuating, and erratic. To capture this complexity, mathematical models have been developed. One such model, a two-dimensional representation of psychotherapy timing and emotional valence, focuses on the valence (positive or negative emotional tone) of both client and therapist. Incorporating delayed reactions from both parties, the model employs delayed differential equations. This modification enables the emergence of complex dynamics, potentially exhibiting chaotic behavior characterized by a positive Lyapunov exponent. The interplay between delayed reactions and therapist distress of the client-therapist alliance drives these chaotic dynamics. Our findings have significant implications for understanding the psychotherapy process, highlighting the importance of temporal factors and therapeutic relationships.