Interviewed intentions are weak predictions of future behavior
Aliases: behavioral intention · hypothetical bias · intention-behavior gap
What it is
An interview answer about future action is a stated intention, not a reliable individual forecast. The respondent has not yet encountered real price, time, alternatives, social pressure, and interaction friction. “I would buy or use this” is better evidence about current evaluation and conditions than an adoption-rate estimate.
Why it happens
Hypothetical questions elicit simulations based on an ideal self and incomplete context. Opportunity, habit, and competing goals intervene later, while the presented concept increases salience and polite agreement. Intentions can predict better when conditions are concrete, time is short, control is high, and the action is feasible, but still require calibration.
Studying it
Link intentions to later registration, trial, payment, or continued use and estimate calibration by condition. Probe triggers, barriers, alternatives, and analogous past choices instead of collecting binary promises. Concept tests can introduce real trade-offs, deposits, or waiting when ethical and proportionate.
Where it stops holding
Intention is not worthless: it reveals acceptable conditions, rejection reasons, and self-understanding and may correlate with behavior in aggregate. Near-term plans grounded in experience and controllable resources are often more stable than distant reactions to novel products. Limited prediction does not make wishes or concerns mistaken.
Applying it
- Ask under what conditions action would or would not occur.
- Probe the most recent analogous choice, actual costs, and alternatives.
- Report purchase intention separately from trials, reservations, or price-bearing choices.
- Build an intention-to-behavior calibration after launch rather than forecasting adoption from interview agreement.