Behavioral Addiction Withdrawal as an Experimental Reference for Bereavement: A Reward Deprivation Framework

Bereavement is a major psychosocial stressor with consequences for mental and physical health, and some individuals develop prolonged grief disorder. Yet loss onset cannot be experimentally scheduled, making systematically obtained pre-loss physiological baselines and complete within-person trajectories from before loss through acute response and subsequent adaptation difficult to achieve. This narrative conceptual review develops a research agenda for using evidence from behavioral addiction withdrawal to inform selected mechanistic questions in bereavement within a reward deprivation framework. Rather than treating bereavement and behavioral withdrawal as equivalent states, the framework focuses on the disruption of highly salient reward-related and regulatory functions as a process-based starting point for mechanistic testing. Through a targeted literature synthesis of relevant empirical and theoretical studies, we evaluate the evidence across individual physiological markers, within-person temporal trajectories, and cross-system brain-body relationships, corresponding to the point, line, and plane levels, respectively. Behavioral interruption offers a human experimental window in which onset, duration, release, and repeated measurement can be prospectively defined. However, withdrawal-derived evidence differs substantially across physiological domains in directness, consistency, and mechanistic maturity. We therefore use these evidence boundaries to define a critical research agenda: relatively direct and reproducible findings identify priority reference dimensions for bereavement research, whereas heterogeneous or contested findings require conditional testing, and sparse, indirect, or persistently contradictory findings should remain provisional rather than be assumed to generalize to bereavement.