The measured findings about creative and productive work have an unromantic theme. The obstacles to good work are mostly ordinary: habits of mind, interruptions, and the strain people carry between tasks and between home and office. The entries in this group are less about genius than about everything that stops it.
The mind's own obstacles
The oldest findings concern how a familiar answer blocks a better one. The Einstellung Effect, from Luchins's water-jar experiments, shows people applying a known method long after a simpler one becomes available. Functional Fixedness shows familiarity with an object's usual purpose hiding an unusual use for it. Schlep Blindness, Paul Graham's name for the tendency not to notice problems whose solutions would be tedious, extends the idea from puzzles to business.
The Incubation Effect is the counterweight. Setting a problem aside improves later solutions, especially for problems that need restructuring, which suggests the block is often loosened by stopping rather than by pushing harder.
Who produces, and when
A second set of findings is about distribution and timing. Lotka's Law and Price's Law describe how heavily output is concentrated among a few authors. Multiple Discovery records that important ideas are usually found by several people at once, because the prerequisites arrived for everyone together. Read side by side, they suggest that creative work is both highly unequal and less individual than the famous names imply: a few people produce most of it, and many of them were racing each other to the same result.
Work as a shared strain
The newest findings treat work as something people carry with them. Attention Residue shows part of the mind staying with an unfinished task after switching. Work-Family Spillover and the Crossover Effect show strain and engagement passing between work and home, and between colleagues and partners. Karoshi, Japan's legal category for death from overwork, is the extreme end of the same scale.
The Köhler Motivation Gain is the hopeful exception: the weaker member of a pair works harder when the team's success depends on them. The social side of work can raise effort as well as drain it.
Where it applies
The practical uses are unusually specific. A calendar full of short gaps between meetings produces attention residue all day; the evidence favours fewer, longer blocks. A research group that assumes its idea is unique ignores multiple discovery and may lose a priority race it did not know it was in. A team leader choosing how to pair people can use the Köhler effect deliberately. And any organisation that measures commitment by hours is running a smaller version of the experiment Japan recorded under karoshi.
Where it is argued over
Two entries here are better known than their evidence. Gladwell's 10,000 Hour Rule turned an average from one study of violinists into a threshold, and Ericsson, whose research it came from, rejected that reading. The Goal-Setting Effect is among the best-supported findings in organisational psychology, and the dispute is about its side effects, since goals narrow attention and invite gaming. Lotka's and Price's laws hold as shapes but not as exact formulas, which vary by field and by how authorship is counted.
Why it is worth knowing
Most advice about creativity is about inspiration. The evidence points elsewhere: to the habits that block new ideas, the interruptions that fragment attention, and the strain that follows people home. Those are things a person or an organisation can change, which makes this group more useful than the romance of genius it quietly replaces.
The entries behind this essay: Evidence in Creativity & Work. Every subject has its essays on the essays page.