This right–handed 14–month–old—a participant in research by Rachel Keen and colleagues—is having a hard time getting the applesauce he has been offered into his mouth. As the photo on the left shows, he has been presented the spoon with its handle to his left, but he has grabbed it with his dominant right hand, which makes it extremely difficult to keep the spoon upright on its way to his mouth. A spill ensued.

COURTESY OF RACHEL KEEN