Information–motivation–behavioral skills model
Also known as: IMB model
Behavior change requires accurate information, the motivation to act, and the concrete skills to carry it out.
What it means
The IMB model holds that health behavior follows from three determinants: relevant, accurate information about the behavior; motivation (personal attitudes plus perceived social support); and behavioral skills — the actual ability and self-efficacy to perform the acts involved. Crucially, information and motivation are thought to work largely through behavioral skills, so knowing and wanting are insufficient if a person cannot competently do the specific steps. Developed for HIV prevention, it has since been applied to adherence, screening, and other health behaviors. Its parsimony is a strength, but it can underspecify the social and structural barriers that sit outside individual skill. It matters because it pinpoints the common failure mode of campaigns that deliver facts and urgency yet never teach the skill, so behavior never changes.
Examples
An HIV-prevention program that explains transmission and stirs concern fails unless it also rehearses the behavioral skill — negotiating and correctly using protection in the moment.
Diabetes patients can recite their carbohydrate targets and badly want steady blood sugar, yet nothing shifts until a nurse has them practise reading labels and dosing insulin at a real meal.
Security training that explains phishing and warns of the consequences changes little; staff only start catching fakes once they have rehearsed checking sender addresses and reporting a suspect email.
First described in Jeffrey Fisher & William Fisher (1992).