The Incentive-Sensitization Theory of Addiction 30 Years On.
Level 5 - mechanism / opinion, no new human data
Narrative review and theoretical evaluation without systematic search methodology or original human empirical data.
PubMed 39094061 · doi:10.1146/annurev-psych-011624-024031
What was done
The authors conducted a 30-year narrative review and theoretical evaluation of the incentive-sensitization theory (IST) of addiction. They compared IST with competing addiction models (opponent-process, habit, and prefrontal impulse-control dysfunction theories), responded to critiques concerning craving and compulsivity, and discussed applications to behavioral addictions, dopamine dysregulation syndrome in Parkinson's disease, attentional capture, approach behavior, and reward uncertainty.
What was found
The abstract reports no numerical or quantitative findings. Conceptually, it affirms the core tenets of IST: that mesolimbic dopamine systems mediate incentive salience ("wanting") rather than hedonic impact ("liking"), and that drug-induced neural sensitization selectively and persistently amplifies wanting without increasing liking in vulnerable individuals.
Why it matters
This paper provides an authoritative long-term synthesis of a foundational neurobiological model of addiction, detailing how the dissociation between wanting and liking applies across substance use disorders and newer behavioral addictions.
Limits
The paper is a non-systematic narrative review providing theoretical synthesis rather than quantitative effect sizes or primary data. The abstract does not report search methodology, inclusion criteria, or empirical sample sizes.