Example of Extraneous Variables: Expressive Writing Experiment

Which of the following best describes a situational variable in a research experiment?

If a researcher administers a cognitive test to half the participants in a brightly lit room and the other half in a dimly lit room, the lighting condition acts as a situational variable.

A researcher is conducting various experiments in psychology. Match each specific environmental factor with the category of situational variable it represents.

Arrange the following research environments in order from those that provide the GREATEST control of situational variables (Position 1) to those that provide the LEAST control (Position 3).

Which of the following best explains why environmental factors, such as the time of day or the physical setting of a laboratory, are classified as situational variables that must be controlled in an experiment?

An extraneous variable that refers to the environmental or contextual factors present during an experiment, such as the noise level, room temperature, or time of day, is specifically categorized as a(n) _____ variable.

Imagine you are a peer reviewer assessing a study on reading comprehension. You find that the 'high-stress' group was tested in a crowded, noisy cafeteria, while the 'low-stress' group was tested in a silent library. In your methodological critique, you would argue that the researchers failed to control for a(n) _____ variable, making it impossible to determine whether any effect was caused by stress or by the physical environment.

A researcher wants to study the effects of caffeine on memory. They test the caffeine group in a brightly lit, warm room at 8:00 AM, and the control group in a dimly lit, cool room at 4:00 PM. True or False: By failing to keep the lighting, temperature, and time of day constant, the researcher has failed to control situational variables, which could unintentionally influence the dependent variable.

In an experiment investigating how expressive writing affects stress levels, analyze the role of each variable by matching it to its correct classification.

Evaluate the following steps a researcher should take to systematically identify, assess, and control situational variables in a psychology experiment. Order them from the initial planning stage to the final execution stage.