How Testing Kids For Skills Can Hurt Those Lacking Knowledge

Excerpted from THE KNOWLEDGE GAP by Natalie Wexler, published by Avery, an imprint of Penguin Publishing Group, a division of Penguin Random House, LLC. Copyright © 2019 by Natalie Wexler.

By Natalie Wexler

In 1987, two researchers in Wisconsin, Donna Recht and Lauren Leslie, constructed a miniature baseball field and installed it in an empty classroom in a junior high school. They peopled it with four-inch wooden baseball players arranged to simulate the beginning of a game. Then they brought in sixty-four seventh- and eighth-grade students who had been tested both for their general reading ability and their knowledge of baseball.

The goal was to determine to what extent a child’s ability to understand a text depended on her prior knowledge of the topic. Recht and Leslie chose baseball because they figured lots of kids in junior high school who weren’t great readers nevertheless knew a fair amount about the subject. Each student was asked to read a text
describing half an inning of a fictional baseball game and move the wooden figures around the board to reenact the action described.

Churniak swings and hits a slow bouncing ball toward the shortstop, the passage began. Haley comes in, fields it, and throws to first, but too late. Churniak is on first with a single, Johnson stayed on third. The next batter is Whitcomb, the Cougars’ left-fielder.

It turned out that prior knowledge of baseball made a huge difference in students’ ability to understand the text—more of a difference than their supposed reading level. The kids who knew little about baseball, including the “good” readers, all did poorly. And among those who knew a lot about baseball, the “good” readers and the “bad” readers all did well. In fact, the bad readers who knew a lot about baseball outperformed the good readers who didn’t.

In another study, researchers read preschoolers from mixed socioeconomic backgrounds a book about birds, a subject they had determined the higher-income kids already knew more about. When they tested comprehension, the wealthier children did significantly better. But then they read a story about a subject neither group knew anything about: made-up animals called wugs. When prior knowledge was equalized, comprehension was essentially the same. In other words, the gap in comprehension wasn’t a gap in skills. It was a gap in knowledge.

The implication is clear: abstract “reading ability” is largely a mirage constructed by reading tests. A student’s ability to comprehend a text will vary depending on his familiarity with the subject; no degree of “skill” will help if he lacks the knowledge to understand it. While instruction in the early grades has focused on “learning to read” rather than “reading to learn,” educators have overlooked the fact that part of “learning to read” is acquiring knowledge.

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