The Nested States Model: A Phenomenologically-Grounded Model of the Mind.

Subjective experience is central to mental illness but has been neglected in empirical psychopathology. A framework called the Nested States Model (NSM) describes the dynamic structure of experience as a system of nested states that influence each other across hierarchical layers. The NSM provides a scheme for characterizing patterns of experience in psychopathological processes, aiding clinical practice and research. It advances three aims: centering clinical formulations on subjective experience, organizing findings from clinical-phenomenological research to build broader models, and aligning perspectives on experience with brain dynamics to bridge phenomenological and neurophysiological work.

Study at a glance

Abstract

Subjective experience is central to the nature of mental illness, yet it has not played a central role in most empirical approaches to psychopathology. While phenomenological perspectives in psychiatry have seen a recent resurgence, there remains a need for more detailed models of psychopathological processes based on explicit phenomenological and enactive foundations. We present a framework derived from the Nested States Model (NSM) through which such phenomenologically-grounded models might be constructed. The NSM describes the dynamic structure of subjective experience as a system of nested states that reciprocally influence one another across hierarchical layers. Here, we show how the NSM provides a scheme for characterizing patterns of experience that comprise various psychopathological processes. We demonstrate the utility of this scheme both for clinical practice and for building our knowledge of psychopathological processes more broadly. The NSM can advance three aims that we see as critical for the lasting integration of phenomenological approaches to psychopathology within psychiatry. First, we show that the NSM provides a means for constructing clinical formulations and treatment considerations that center squarely on an individual's subjective experiences. Second, the NSM supplies a framework for organizing findings from clinical-phenomenological research that can guide the construction of broader phenomenologically-grounded models of psychopathological processes. Lastly, the NSM aligns our perspective on subjective experience with emerging perspectives on brain dynamics, helping to bridge phenomenological work with ongoing neurophysiological research.