CHAMPAIGN, Ill. — Researchers at the University of Illinois and the U.S. Department of Agriculture Forest Service suggest in a new study that environmental greenness may not be associated with higher test scores in schoolchildren after all.

In a study that involved more than 400 public schools in Chicago, the Illinois-led team found that there was “no convincing evidence for a positive relationship between greenness and academic performance.” The study was published recently in the journal Landscape and Urban Planning.