Intervening variable

An intervening variable is a concept used to explain how or why two variables are related by introducing a third factor that influences the relationship. Think of it as a bridge that helps connect an initial cause to an effect, clarifying the process in between. For example, you might say that stress (cause) affects health (effect), but this relationship is influenced by sleep quality (intervening variable). It helps researchers understand the underlying mechanisms that link one thing to another, making the connections more accurate and meaningful.