When Does Hungry Become Hangry?

Have you ever been grumpy, only to realize that you're hungry? Many people feel more irritable, annoyed, or negative when hungry - an experience colloquially called being "hangry." The idea that hunger affects our feelings and behaviors is widespread - from advertisements to memes and merchandise. But surprisingly little research investigates how feeling hungry transforms into feeling hangry. Psychologists have traditionally thought of hunger and emotions as separate, with hunger and o