Domain neglect

A product manager was responsible for developing a mobile health application. The brief emphasised user engagement. She focused accordingly: modern interface design, intuitive navigation, appealing visual language. The development team shipped a product that looked polished and performed well on usability metrics.

It could not launch. Healthcare data applications operate under regulatory frameworks - compliance requirements, clinical validation protocols, data security standards - that the team had not consulted. These requirements were not within the product manager's domain of primary expertise. They had not been invisible; they simply had not been retrieved, examined, or applied.

The application was technically sound. It was legally unready. The gap was not in effort but in which domain's knowledge had been brought to bear.

What It Is

Domain neglect is the tendency to neglect relevant domain knowledge while solving interdisciplinary problems. When a problem spans multiple fields - design and medicine, engineering and law, policy and economics - critical information from one of those fields may simply not be retrieved or applied, even when it exists and would be accessible under other circumstances.

This is not the same as ignorance. It is a failure of retrieval and activation: the relevant knowledge may be available, but the problem has been framed in terms of one domain, and the other domain's requirements do not naturally surface.

The Mechanism

When people face problems that require cross-domain thinking, they tend to default to familiar knowledge structures. The domain most associated with the problem as framed receives the most attention. Other relevant domains may be less salient - their relevance is not immediately obvious from the framing.

This tendency to rely on entrenched mental schemas and favour the readily accessible domain over a less-immediately-obvious one is thought to be the mechanism behind domain neglect. The mechanism is drawn from general cognitive psychology: the mind works with what is most accessible, and under cognitive load or time pressure, cross-domain retrieval tends to be systematically underweighted.

The result is solutions that are optimised within one domain's terms and underdeveloped in another's - which can produce costly failures at precisely the boundary where the two domains meet.

Why It Is Not Just Laziness

Domain neglect is not simply a failure to work hard enough or to know enough. Two misunderstandings are common.

It is not about effort. A team working diligently on an interdisciplinary problem may produce thorough, careful work within the domains they have activated - and still miss a critical domain that was never brought into the frame.

Experts are not immune. Specialists in one domain are as susceptible to neglecting adjacent domains as generalists. The deep knowledge of a specialist is precisely in their own domain. The adjacent domain's requirements do not necessarily become more visible with expertise - they may become less so, as the specialist's framing of problems becomes more deeply embedded in their own field.

Where It Shows Up

Engineering projects. Systems designed to technical specifications may satisfy all performance criteria and fail regulatory, safety, or environmental requirements that were not part of the engineering frame.

Technology development. Software built around functionality and user experience may overlook legal, privacy, or accessibility requirements that are governed by entirely different professional domains and regulatory frameworks.

Policy design. Policies developed primarily within economic or administrative frameworks may overlook social, psychological, or environmental dynamics that belong to other disciplines and prove decisive in implementation.

Medical and clinical contexts. Clinical decisions made primarily within a biomedical frame may overlook patient circumstances, social determinants, or practical constraints that belong to social work, psychology, or public health.