Implementation intentions are specific details for when and how a behavior should or will be performed.
These are often formulated as ""if-then"" rules, such as:
- "if I crave something sweet, I'll have fruit instead of candy"
- "if I am in the mood for a cigarette, I'll wait 5 minutes—then, if I still want it, I can have one"
Other examples include studies where flu vaccination uptake was higher in groups of people nudged to make more specific plans (i.e. picking a specific time and date, along with a mode of transport to a specific clinic). The same general effect was observed with voting behaviors.
These are a generally low-cost tool to slightly improve the gap between intention and performance of a behavior.