The Coherence Primitive: Why Early Development Requires Matched Input

This paper identifies matched input as the primitive underlying early development. Infants do not learn through narrative or symbolic content; they learn through coherence — the alignment of sensory channels that allows the nervous system to treat an event as real. When visual, auditory, tactile, and temporal cues correlate, the orienting reflex resolves and calibration proceeds. When cues do not match, the infant remains in a state of unresolved alertness, attending without learning. Modern environments increasingly present salience without contingency: motion without movement, sound without source, and events without physical consequence. These unmatched signals repeatedly trigger the orienting system while withholding the cross‑sensory information required for prediction and regulation. The result is attention instability, weakened prediction, difficulty settling, and early identity instability. The paper defines the coherence primitive, describes the calibration cycle, outlines the developmental consequences of unmatched input, and argues that restoring coherence is structurally simple. Coherence is not an advanced feature of experience; it is the minimal condition for development.