This essay is also available as a preprint on PsyArXiv. To cite it, use the following reference (APA 6th edition):
White, R. D. (n.d.). The lever and the enter key: A conceptualization of agent-mediated software development as a functional analog of brain stimulation reward. Retrieved from https://osf.io/preprints/psyarxiv/zxpwg_v1
Abstract Olds and Milner (1954) reported that rats with electrodes implanted in the septal area would learn to lever-press for brief pulses of electrical stimulation delivered to the implant site, establishing what is now called brain stimulation reward (BSR) and its operant counterpart, intracranial self-stimulation (ICSS). Subsequent work demonstrated that rats stimulated in the lateral hypothalamus or medial forebrain bundle would respond at sustained high rates (Olds, 1958a) and would self-stimulate to physical exhaustion without satiation under extended testing (Olds, 1958b), would forgo food to the point of starvation when both food and stimulation were available concurrently (Routtenberg & Lindy, 1965), and would respond for brain stimulation in competition with shock avoidance (Valenstein & Beer, 1962). Researchers have since demonstrated the phenomenon in multiple species, including humans, with published case reports of compulsive self-stimulation that closely mirror the rodent literature (Bishop, Elder, & Heath, 1963; Moan & Heath, 1972; Portenoy et al., 1986). The purpose of this essay is to (a) review BSR and its proposed neural mechanism with appropriate hedging of the contested causal role of dopamine, (b) propose a structural analogy between BSR and the reinforcement profile generated by interaction with large language model (LLM) coding agents (e.g., Claude, Codex), and (c) clarify that the behaviors examined in this essay are conceptually distinct from the cluster of LLM-associated psychotic phenomena recently discussed in the clinical literature on so-called “AI psychosis” (Flathers et al., 2026; Morrin et al., 2026), which refer to delusion formation rather than compulsive use. I close with a personal observation, as the analogy did not become persuasive to me until I noticed it operating in myself.
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