The Affective Deficiency Syndrome (SDA): a proposed clinical–translational model linking early bond disruption, adult attachment, and relational and physiological patterns

Background. A large developmental literature ties the quality of the early caregiving bond to lifelong patterns of relating. Clinically, adults often present a recognizable cluster (chronic approval-seeking, fear of abandonment, "love by crumbs," difficulty receiving affection that is not earned) that current categories describe only in pieces, without an integrating vocabulary bridging the psychological pattern to its possible physiological substrate. Proposal. This paper proposes the Affective Deficiency Syndrome (SDA): a model that (1) names this cluster as a coherent clinical entity grounded in attachment theory; (2) frames it as the disruption or insufficiency of the early affective bond expressing itself, in adulthood, as a stable pattern of seeking, through performance or conquest, the affirmation that was missing at origin; and (3) proposes candidate neuroendocrine and autonomic substrates as hypotheses to investigate, not established mechanisms. Epistemic status. The psychological backbone (attachment) is presented as well established; the molecular and hormonal layer (including oxytocin) is presented with explicit caution given known replication problems. The model is advanced as a proposed, testable framework and a scalable educational instrument, not a diagnostic act. Relevance. The state described is highly prevalent, maps onto relational distress, and, through chronic psychosocial stress and social disconnection, onto documented pathways of physiological cost and mortality, giving the model applied value for prevention.