The Recruitment and Termination Threshold (RTT) Framework proposes that variation in two control parameters governs transitions into and out of deliberative processing: a Recruitment Threshold (RT), determining when intuitive processing gives way to deliberate auditing, and a Termination Threshold (TT), determining when an active audit is released. Drawing on the Opportunity Cost Model of cognition, the framework suggests that extreme threshold configurations produce sustained metabolic strain when mismatched with environmental demands, and proposes these configurations as candidate mechanisms underlying clinical presentations of Autism Spectrum Condition, Attention Deficit Hyperactivity Disorder, and Cognitive Disengagement Syndrome. The framework derives a symmetric high-threshold cognitive profile — the Intuitistic — as the structural counterpart to the Autistic profile, representing the opposite pole of the Recruitment Threshold spectrum. Characterized by reduced spontaneous recruitment and high Cognitive Reserve, this predicted population was subsequently located within the emerging literature on Cognitive Disengagement Syndrome. The RTT Framework integrates with dual-process and predictive processing accounts, provides a structured lens for interpreting neurodivergent behaviors, and generates six falsifiable predictions. Within this model, disorder is reframed not as intrinsic deficit, but as the predictable outcome of a mismatch between constitutional threshold configuration and environmental demand.