A study investigating memory biases in individuals with hypochondriasis serves as a clear example of utilizing a non-manipulated independent variable. In this experiment, researchers manipulated the type of word presented to participants (health-related versus non-health-related) while simply measuring the participants' pre-existing levels of hypochondriasis. The results demonstrated that individuals high in hypochondriasis selectively recalled more health-related words, highlighting how a measured participant variable can interact with a manipulated factor to produce distinct psychological outcomes.