Consumers are more likely to purchase unintentionally green products, according to a recent study.

Researchers from the University of Chicago and Yale University found that people are more likely to purchase a product if they think helping the environment is not the intended purpose of a product improvement. This is because they assume green products have lower quality.

"When a company makes a product that is better for the environment, consumers are actually less likely to purchase it if the environmental benefit is perceived as intentional rather than the result of some other effort," researchers George E. Newman, Margarita Gorlin, and Ravi Dhar said in the study. "If a company intentionally made a product better for the environment, consumers believe the product's quality must have suffered because the company diverted resources away from product quality."

In a series of studies, consumers learned about a company that manufactures household cleaning products and were told that the company either intended to make the product better for the environment or that the environmental gain was the result of another improvement.

Consumers thought the products were higher in quality and were more likely to purchase the cleaning products when the improvement was unintended. Even when the company's intentions were not disclosed, consumers thought the products suffered from a quality control problem, suggesting that consumers automatically perceive green products as being lower quality even when a company does not specify its intentions.

"Companies improving a basic product feature (making something more environmentally friendly or better tasting) should either position the improvement as unintended or emphasize that the primary goal is improving the quality of the product. On the other hand, companies looking to advertise their fair trade or sustainable production practices or their donations to charity can advertise those actions without worrying that it will affect perceptions of their products," the authors conclude.

The findings were recently published in the Journal of Consumer Research.