Reciprocal causation is when two things happen and they cause each other to happen at the same time. It's like a circle that goes around and around. For example, let's say you like playing video games, so you play video games more often. Playing more video games makes you like it even more, so you play even more video games. This cycle keeps going on and on. That's what reciprocal causation is! It's when two things keep making each other happen over and over again.