Intention-action gap
Also known as: Intention–behavior gap
Good intentions routinely fail to translate into the behavior they were meant to produce.
What it means
The intention-action gap is the pervasive discrepancy between what people sincerely intend to do and what they actually do, especially for effortful, future-oriented behaviors like exercising, saving, or following through on health plans. Forming an intention is necessary but far from sufficient: present bias, forgetting, competing demands, visceral states, and inadequate planning all intervene between resolve and action. Meta-analyses find that changes in intention produce much smaller changes in behavior, with a large share of 'inclined abstainers' who intend but never act. The gap motivates interventions that bypass willpower — implementation intentions, defaults, reminders, and commitment devices — which work by linking intentions to concrete cues and constraints. It is a central organizing problem for applied behavioral science and behavior-change theory.
Examples
Nearly everyone who resolves on January 1 to exercise more intends it genuinely, yet most have lapsed within weeks.
Employees genuinely mean it when they say they will raise their pension contribution next month; the month comes, the form never gets filled in, and nothing happens by itself.
Flu-jab uptake rises when the reminder letter asks people to write down a date and time — the intention was already there, and the plan was what was missing.
First described in Sheeran (2002); Gollwitzer (1999).