A wee lapse into the boundaries of psychoanalytic and chaos theory....
The personality is a Markov Blanket...an informational boundary that separates the system (the personality) from the world around it. It filters what can enter and leave the system, so the system never contacts the world directly; only through signals crossing that boundary.
The Schizoid adaptation involves retreating the Blanket. Its logic involves minimizing free energy and protecting fragile self-structure from overwhelming, chaotic environmental input; therefore, the schizoid defense physically and psychologically shrinks its Markov blanket. By shrinking from external objects, the system isolates its internal states, choosing to prioritize internal data rather than risk the unpredictable prediction errors of relational intimacy (this is what Lacan calls "aphanasis").
The Histrionic (or Hysterical) strategy follows the logic of flooding the Blanket. The histrionic structure attunes exquisitely (anxiously) to external sensory and relational data, constantly seeking relational input and outward validation to stabilize an underlying internal vacuum. It opens the boundary wide, generating rapid, shifting, and highly charged emotional expressions to capture the attention of external "objects," effectively relying on the environment to modulate its internal prediction errors.