Daniel Kahneman. Think slowly... Solve quickly (№ 391355)

Half of the subjects received the tasks small font and pale printed. The font is called cognitive stress. The test results clearly showed that 90% of students who received fine printed test, made at least one error. In the group of subjects who received a job with a barely legible font, the wrong number has fallen to 35 %. You read that right: with a bad font, the results were better. Cognitive strain, whatever its source, mobilizes System 2, which is more likely to reject the intuitive answer System 1.