Costanza conducts a true experiment examining the effect of energy drinks on work performance. Costanza productivity is monitored prior to and after the use of energy drinks. As such, you know that her experiment has _____ internal validity.
A) no
B) low
C) adequate
D) too much

Question

Quizplus · Accepted Answer

A true experiment, where the researcher manipulates an independent variable (in this case, the use of energy drinks) and measures its effect on a dependent variable (here, work performance), while controlling for extraneous variables, typically has adequate internal validity. This is because it allows for the establishment of a cause-and-effect relationship between the variables.

Costanza Conducts a True Experiment Examining the Effect of Energy