Additive Bias

The glitch, explained plainly.

Imagine you're building a Lego bridge and one tower is taller than the other. Most people reach for more blocks to make the short tower taller. But a kid might just pull one block off the tall tower—that's quicker and easier! Our brains are like that: whenever something is wrong, we think 'what can I add to fix it?' instead of 'what can I take away?' It's like always putting more toppings on a pizza that already has too much instead of removing the one topping that makes it taste bad.

Additive bias describes the deeply ingrained human default of searching for solutions that involve adding components—features, rules, steps, materials—rather than considering whether removing components would be more effective. When people attempt to improve objects, ideas, or situations, additive transformations come to mind more quickly and with less cognitive effort, causing subtractive alternatives to be systematically overlooked. This bias intensifies under cognitive load, time pressure, and when individuals have limited opportunities to reconsider their initial approach. The result is that people routinely miss simpler, more elegant solutions that involve taking away rather than piling on, contributing to bloated systems, overburdened schedules, and unnecessary complexity across virtually every domain of life.

Where it shows up.

1. 01 A project manager notices that the team's weekly status meetings run too long and aren't productive. She responds by adding a new pre-meeting agenda template, a digital timer for each speaker, and a follow-up form. The meetings are now even more process-heavy. She never considered simply canceling two of the four weekly meetings.
2. 02 A software team receives feedback that their app is confusing for new users. The lead designer proposes adding an onboarding tutorial, tooltip popups, and a help center section. The team implements all three. Nobody suggests that the confusion stems from three redundant navigation paths that could simply be removed to make the interface intuitive without explanation.
3. 03 A city government wants to reduce traffic congestion. Officials propose building new bypass roads, adding a carpool lane, and installing smart traffic signals. An urban planner's suggestion to close one specific through-road—which research shows would reduce overall congestion by redistributing flow—is barely discussed because it feels counterintuitive to remove infrastructure to solve a capacity problem.
4. 04 A writer struggling with a novel's pacing adds a new subplot and two secondary characters to make the middle section more engaging. Her writing group loves the additions. Months later, an editor points out that removing one existing subplot that slowed momentum would have fixed the pacing more effectively and kept the novel 40 pages shorter.
5. 05 A university curriculum committee reviews declining student satisfaction scores for a degree program. They approve three new elective courses, a mentorship program, and a capstone seminar. Satisfaction ticks up slightly. A visiting accreditor later notes that simply removing two redundant prerequisite courses—which students consistently identified as the primary frustration—would have addressed the core complaint more directly and at zero cost.

Where it shows up at work.

The same glitch looks different depending on the terrain. Finance, medicine, a relationship, a team — same mechanism, different costume.

In history.

• The U.S. tax code has grown from roughly 400 pages in 1913 to over 70,000 pages through decades of adding provisions, credits, and exceptions, with virtually no successful large-scale simplification efforts despite widespread recognition of its complexity.
• Microsoft Word and similar software products became increasingly bloated through decades of feature additions, prompting competitors like Google Docs to gain market share partly by offering a deliberately stripped-down alternative.
• The removal of pedals from children's bicycles to create balance bikes (commercialized around 2007) was a rare subtractive innovation that took nearly a century to conceive despite children's bicycles being heavily iterated upon with additive changes like training wheels, multiple gears, and shock absorbers.