Most people will add something — even when subtracting makes more sense

Picture a bridge made of Lego blocks. One side has three support pieces, the other two. How would you stabilize the bridge? Most people would add a piece to the short stack, a new study suggests. But why not remove a piece from the taller stack? When it comes to Lego blocks, ingredients in a recipe or words in an essay, people prefer to add, not subtract.