Mere Measurement Effect
The phenomenon where asking about intentions increases the likelihood of those behaviors.
Also known as: Question-behavior effect, Self-prophecy effect, Measurement reactivity
Category: Psychology & Mental Models
Tags: psychology, behaviors, measurement, intentions, commitment
Explanation
The mere measurement effect (or question-behavior effect) is the phenomenon where asking people about their intentions to perform a behavior increases the likelihood they will actually perform it. Simply measuring intentions changes behavior. Mechanisms include: making intentions salient (bringing to conscious attention), creating cognitive dissonance (pressure to be consistent), and activating relevant knowledge (priming related concepts). The effect has been demonstrated for: voting (asking if you'll vote increases voting), purchasing (asking about buying increases purchases), exercising (asking about exercise increases activity), and health behaviors (asking about checkups increases attendance). Applications include: surveys that influence behavior they measure, self-monitoring effects (tracking changes behavior), and commitment devices (stated intentions become more binding). Limitations: effect is modest in size, works better for socially desirable behaviors, and decays over time. For knowledge workers, the mere measurement effect suggests: tracking goals increases achievement, stating intentions publicly creates commitment, and being aware that measurement influences what's measured.
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