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THEORY-895: Incentive sensitization: repeated drug exposure can make the mesolimbic 'wanting' system lastingly hyper-reactive to drug cues and contexts, so that cue-triggered incentive salience grows, persists for years and even increases during abstinence, while 'liking' need not rise and may fall; sensitized 'wanting' can oppose the person's cognitive desire, and incentive salience can run without any reportable change in feeling

4 min read

Properties7
StatusProposed
Version2
Tagsmotivation, psychopathology-and-treatment, neuroscience, learning-and-conditioning
SourceLIT-1461 — Liking, wanting, and the incentive-sensitization theory of addiction
Bears onQUESTION-267 — When the ordering that prevails a system's negotiation ranks its states by a proxy for its maintenance rather than by its maintenance, as a firm's potential metric may, is that valence, and is it the form that metric fixation in organizations and addiction in persons share?, QUESTION-268 — What record of an organization's or an animal's conduct shows that one ordering prevails in the negotiation among its perspectives, which conflicts it wins, for how long, and whether it returns after interruption, and does potential measured on conflicts actually won give the same verdicts as potential read as a disposition?
SupportsCLAIM-437 — 'Wanting' and 'liking' are saliences relative to different, overlapping processes, pursuit and consummation, each ranking states by their bearing on its own concerns; valence is then relative to a perspective, every perspective in the negotiation has its own, the system's valence is that of the perspective whose ordering is the negotiation's potential, and ambivalence is strong saliences of opposite sign with no potential absorbing them, CLAIM-447 — Model-based wanting is a pursuit process's ranking of the futures it predicts under candidate interventions, P(S | do(a)) against P(S | do(a₀)), while cue-triggered wanting is learned salience that need not compute those futures; a process's causal model, its wanting and its practical efficacy are separable, so learning to want differently, learning that a want will not pay, and learning not to act on it are three different changes
Cited as “grounds” byCLAIM-438 — An ordering serving as the negotiation's potential, as the potential account of valence defines it, tracks 'wanting', not 'liking': sensitized incentive salience wins a system's conflicts, persists and resumes while hedonic impact measured by taste reactivity stays flat or falls, so the regime the account calls hedonic valence is motivational valence, and hedonic valence, if it is anywhere in the account, is elsewhere

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Source

Berridge and Robinson (2016), “Liking, wanting, and the incentive-sensitization theory of addiction”, American Psychologist 71(8):670–679 (LIT-1461), read in full in NOTE-1109 from the NIH author manuscript (PMC5171207). It is unpaginated, so locations are by section.

What was actually shown

A review. The primary studies were not read here.

  • The dissociation it starts from. Dopamine depletion left ‘liking’ reactions to sugar “completely normal” while abolishing motivation, and stimulation raised ‘wanting’ without raising ‘liking’ (introduction; held in THEORY-893).
  • Sensitization, and its independence from pleasure. “Once induced, sensitization is very long lasting, and possibly even permanent.” “‘Liking’, by contrast, need not increase with sensitization, and may even decrease” (Addiction Distorts ‘Wanting’ Versus ‘Liking’).
  • Independence from the person’s goals. Incentive salience “can occur either in opposition to a cognitive desire or even unconsciously in absence of any cognitive desire”. Sensitized ‘wanting’ persists “even if the person cognitively doesn’t want to take drugs, doesn’t expect the drugs to be very pleasant, and even long after withdrawal symptoms have subsided” (after Figure 1; Addiction Distorts).
  • Reactive and context-gated. “A sensitized dopamine system is not always hyper-active, but it is hyper-reactive to drug cues and contexts”, and a novel test context can prevent its expression (Addiction Distorts; Disentangling Reports).
  • It grows in abstinence. “if anything, sensitization grows for some time during abstinence”, which the authors say a withdrawal account cannot explain (Disentangling Reports).
  • In people. Cue-triggered striatal responses are enhanced in addicts. PET studies report that “the greater the cue-induced dopamine release the greater the craving” (Sensitization in Human Addiction, quoting Leyton and Vezina 2013).
  • Beyond drugs, weakly. Sensitization “may in some cases occur without drugs”, and dopamine agonists in Parkinson’s disease produce compulsions without reported pleasure that fade when the drug stops (Other Behavioral Addictions?).

What could have come out otherwise: cue reactivity in abstinent addicts fading with withdrawal; relapse tracking expected pleasure; hedonic reactions rising with pursuit.

What this does not say

  • That every addiction is sensitization. It is “specifically meant to explain individuals who have near-compulsive levels of urge to take drugs” (Addiction Distorts), and “only about 30% of people who take cocaine” become long-term addicts (Individual vulnerability).
  • That behavioural addictions are sensitization. The authors call the evidence “emerging” and the mechanism “not yet understood”.
  • That ‘wanting’ is unvalenced. The same circuitry produces “fearful salience” (Motivational Salience in Desire Versus Dread). The theory is about the strength of the pull, not its sign.
  • That the human evidence measures dopamine directly. “most reports of such hyper-reactivity used fMRI measures, which do not directly measure dopamine” (Sensitization in Human Addiction).
  • Anything about organizations.

Connections

  • THEORY-893 holds the liking–wanting dissociation from the same programme. This account adds the lasting, cue-keyed amplification of ‘wanting’.
  • QUESTION-267. It is the mechanism on the personal side: a ranking whose strength is re-keyed to cues and comes apart from both pleasure and the person’s goals. Its ordering is over cues, which is the difficulty NOTE-1109 raises for TERM-076’s kind clause.
  • CLAIM-433. The recovering addict who relapses is the case of strength without goal conduciveness, read by the person’s goals. This is that claim’s third defeater.
  • CLAIM-439. Motivation that rises without reportable change in feeling is a reported instance of potential without a self-model of it.
  • QUESTION-268. Context-gating means a conflict record taken outside the gating context will understate this kind of potential.
  • Flayelle et al. (LIT-1465) use it as one of their two model-free routes by which design features promote uncontrolled use.

Note of 2026-10-29: what holds it back

The record holds sensitization only as Berridge and Robinson’s review reports it; NOTE-1109 read none of the primary studies. No primary study the record reads shows, in animals, a lasting rise in cue-triggered pursuit after intermittent exposure with taste reactivity flat and expression gated by context, or, in people, cue-triggered dopamine release measured by PET that tracks craving while hedonic ratings stay flat. A split into what the authors propose would free nothing: CLAIM-438, CLAIM-437 and CLAIM-447 use sensitization as a fact, and the last two rest on Proposed claims besides.

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