the attachment drive organizes proximity-seeking behaviors to secure the nearness of attachment figures in two primary ways: signaling behavior, which is designed to bring the attachment figure closer, and approach behavior, which is designed to bring the individual closer to the attachment figure
This passage provides the foundational theoretical definition of proximity-seeking within attachment theory, distinguishing its two motor modalities and explaining how the system modulates itself in response to the reliability of attachment figures.
, Sensorimotor Psychotherapy Interventions for Trauma and, 2015thesis