Interaction Effects

Interaction effects occur when the impact of one variable on an outcome depends on the level of another variable. Instead of adding their effects separately, the variables influence each other, changing the overall result. For example, a medication might work better at higher doses for some people but not others, depending on their age or weight. Recognizing interaction effects helps us understand that variables can work together in complex ways, rather than independently, which is important for accurate analysis and making informed decisions.