Behavioral Science Dictionary

Tunneling

Cognition & Dual-Process

Scarcity narrows the mind to the pressing problem, blinding it to everything outside the tunnel.

What it means

Tunneling is the cognitive narrowing produced by scarcity, in which an acute shortage of a needed resource—money, time, food, or social connection—captures attention and focuses the mind intensely on the immediate lack while neglecting everything that falls outside that focus. It is the double-edged consequence of the scarcity mindset: the same capture that yields a 'focus dividend,' sharpening engagement with the urgent shortfall, also creates a 'tunnel' whose walls hide important but less pressing concerns, so people under scarcity systematically under-attend to the future, to maintenance, to side effects, and to opportunities just beyond the deadline or the budget. Because tunneling consumes mental bandwidth, it also degrades working memory and self-control, helping explain why poverty and chronic time-pressure are linked to choices that look short-sighted but are in fact rational responses to a captured, overloaded mind. The neglected items are not forgotten by choice; they are simply outside the tunnel. It matters because it reframes many 'bad decisions' of the poor and the overstretched as predictable products of scarcity rather than personal failings.

Examples

A person scrambling to make rent fixates on this month's bills and skips a routine car checkup, and the deferred repair later becomes a far costlier breakdown—a maintenance need that sat outside the tunnel.

A team racing a launch date ships on schedule with startling focus, while the bug backlog swells and the new hire goes untrained for a month. Both sat outside the tunnel.

A student cramming overnight absorbs the whole syllabus, and somehow the flatmate's birthday, the overdue rent form, and the dentist appointment all quietly vanish until the exam is over.

First described in Sendhil Mullainathan & Eldar Shafir (2013).

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