From Reflexes to Relational Expectations: How the Infant Body Learns to Predict the Social World

Classic attachment theory identifies distinct relational patterns (secure, avoidant, anxious), yet remains largely descriptive regarding their mechanistic origins in the infant's earliest bodily life. While contemporary cognitive views characterize the mind as inherently anticipatory, they often overlook a developmental puzzle: What supplies the infant's initial expectations before experience accumulates? We argue that attachment prototypes crystallize during the sensorimotor stage (0–24 months) as innate reflexes transform into embodied relational expectations. Rather than beginning as mental representations, the infant's social understanding emerges as bodily habits—sensorimotor schemas carved by the specific ways caregivers respond to the infant's earliest signals. Analyzing four distinct interaction patterns, we demonstrate how: (1) autonomy-supportive responses foster schemas of agency ("My actions influence the world"); (2) over-helping creates passive dependency; (3) neglect induces learned withdrawal; and critically, (4) inconsistent responsiveness triggers Signal Amplification—a somatic calibration wherein infants learn that only intensified, prolonged signals register, forming the anxious prototype not as emotional dependency but as embodied vigilance to the caregiver's perceptual threshold. By tracing the path from reflexes to relational expectations, this account bridges neonatal embodiment and developmental psychology, offering a dual perspective: the infant's body operates simultaneously as a predictive system (minimizing surprise through expectation) and as a lived, historical body (remembering how the world responds), thereby explaining how early care becomes literally incorporated into the child's social reality. Keywords: embodied schemas; sensorimotor stage; predictive processing; attachment formation; signal amplification; threshold-monitoring; self-reliance