The students in Dr.Kent's class are normally very active and there is a high level of classroom participation.However, recently there was an observer in the classroom and the participation level was very low.The change in the responsiveness of the students in Dr.Kent's class illustrates the concept of:

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Quizplus · Accepted Answer

Reactivity is the concept that when people know they are being observed, they may alter their behavior in response to the observation. In this case, the presence of an observer in the classroom caused the students to lower their level of participation, indicating that reactivity was in effect. The other choices do not accurately describe this situation. Experimental control refers to minimizing extraneous variables in an experiment. Negative correlation refers to a relationship in which an increase in one variable is associated with a decrease in another variable. Systematic observation refers to a method of carefully observing and recording behavior in a structured and consistent way.

The Students in Dr