Definition
Belief-driven behavior is action shaped by what a person believes about themselves, others, and the world — operating before the situation is even encountered. The belief acts as a filter: it determines what the person notices, how they interpret what they notice, and what action feels appropriate. The same external event can produce opposite behaviors in two people with different beliefs about themselves.
Maltz's claim, supported by later cognitive psychology, is that beliefs are not summaries of evidence but pre-filters on evidence. A person who believes they are "bad at math" will encounter the same problem set as a confident peer but experience it as proof of their belief, not as data that could revise it.
Why it matters
How it works
The belief sits upstream of perception. When a situation arises, the system rapidly classifies it through the lens of held beliefs, then generates a response appropriate to that classification. The response, by occurring, generates more evidence — which the same filter interprets in a way consistent with the belief. The loop closes on itself.
To break the loop, the practitioner identifies the belief explicitly, gathers evidence that contradicts it, and rehearses a new framing until the system starts using that framing as the default. The change feels improbable while the old belief still runs; once the new one takes hold, the previously-difficult behavior becomes easy.