The aversion to contrary ideas is not a simple artifact of stupidity or ignorance. Yale law and psychology professor Dan Kahan has shown that more sc… - David Epstein

learning itself is best done slowly to accumulate lasting knowledge, even when that means performing poorly on tests of immediate progress. That is, the most effective learning looks inefficient; it looks like falling behind.

Desirable difficulties like testing and spacing make knowledge stick. It becomes durable. Desirable difficulties like making connections and interleaving make knowledge flexible, useful for problems that never appeared in training. All slow down learning and make performance suffer, in the short term.

A separate, international team analyzed more than a half million research articles, and classified a paper as “novel” if it cited two other journals that had never before appeared together. Just one in ten papers made a new combination, and only one in twenty made multiple new combinations. The group tracked the impact of research papers over time. They saw that papers with new knowledge combinations were more likely to be published in less prestigious journals, and also much more likely to be ignored upon publication. They got off to a slow start in the world, but after three years, the papers with new knowledge combos surpassed the conventional papers, and began accumulating more citations from other scientists. Fifteen years after publication, studies that made multiple new knowledge combinations were way more likely to be in the top 1 percent of most-cited papers. To recap: work that builds bridges between disparate pieces of knowledge is less likely to be funded, less likely to appear in famous journals, more likely to be ignored upon publication, and then more likely in the long run to be a smash hit in the library of human knowledge. •