A: abstract art and shapes
Posters of abstract art with organic shapes can reduce work stress by 24 percent and anger by 21 percent, according to a study in Environment and Behavior. Look for pieces by Gregg Robinson, Paul Jenkins, and Joan Miro. Their works are “more playful and curvilinear than geometric formations,” says Byoung-Suk Kweon, Ph.D., the study’s lead author.