Within-Subject Experimental Methods Imagine you are a teacher charged with the responsibility of supervising elementary students playing during recess. One day, you are visibly present to the students, carefully navigating the playground to oversee behaviors of play; you do not notice any behaviors where you might need to intervene (such as fights, bullying, unfair play, etc.). The next day, you follow the same pattern and notice no disruptive behaviors. However, on the third day, you walk around less and find you must redirect some bullying instances. The following day, you go back to your regular pattern, and there are no incidences. How might you assess the situation? Does consistently walking around, being present throughout the playground, reduce the likelihood of disruptive behavior? These types of questions and scenarios are typical areas studied for a within-subjects experimental method (Privitera, 2017). Specifically, researchers examine the same group participants and observe over time with the intent to rule-out time-related factors, which may help reveal what differences may be due to manipulation (Privitera, 2017).
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