Insect movement is often summarized by path length, displacement, emigration, or arrival, yet these endpoints can obscure the distinct decisions that generate a movement episode. A change in trajectory may reflect sensory acquisition, state-dependent valuation, departure, motor control, updating, or target acceptance rather than a single construct called dispersal motivation. This article develops an evidence-constrained behavioral framework in which sensory sampling and internal-state assessment are analytically distinct but reciprocally coupled. Departure is treated as a conditional transition, and movement-mode selection can involve both discrete strategy changes and continuous motor tuning. Chosen locomotor states can, in turn, alter the information available for subsequent decisions. The central contribution is a proposed sequential architecture that will connect these components without claiming that one universal insect decision circuit, threshold, or behavioral sequence has been empirically established. Taxon, life stage, sex, ecological task, environmental reliability, and observational scale are retained as explicit boundaries. The framework is intended to generate transition-specific and scale-indexed predictions that can be tested with experiments and field tracking capable of separating observed movement from inferred motivation. Its value therefore lies in organizing mechanistic evidence and exposing testable discontinuities, not in asserting validated prediction of dispersal outcomes.
