Applying Jakob's Law to a Redesigned Primary Button
A brand refresh redesigns a product's primary button into an unfamiliar, asymmetric shape unlike any button pattern users have seen elsewhere, and ships it product-wide, including in the core app.
Using the operated-vs-perceived distinction from this subject, why is this specifically risky?
The correct answer is "The button is operated, so users rely on a learned pattern to use it."
Jakob's Law argues that users spend most of their time on other products and prefer yours to match expectations formed elsewhere. This subject's operated-vs-perceived rule says that weight applies fully to elements users operate — buttons, forms, navigation — and much less to elements users only perceive, like illustration or marketing-page layout. A primary button is a core interaction element; an unfamiliar shape risks users hesitating to recognize it as clickable, or misjudging where to click, at real cost to task completion.
The distractors invert or misapply the rule: buttons are squarely in the operated category, not perceived-only — perceived-only is where novelty is genuinely safe (illustration, marketing tone); Jakob's Law isn't scoped to navigation specifically, it applies to any operated interaction pattern; and the risk here is the unfamiliar shape and affordance itself, not the color choice, which is a much lower-risk lever for brand expression.
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