Your text describes a study in which researchers played recordings of normal or backward speech to two-day-old babies. The researchers then measured blood flow in the babies' brains. Which of the following alternatives correctly names and labels the variables in this study?
A) experimental variable-normal or backward speech ; control variable-blood flow
B) experimental variable-blood flow ; control variable-normal or backward speech
C) independent variable-normal or backward speech; dependent variable-blood flow
D) independent variable-blood flow; dependent variable-normal or backward speech

Question

Quizplus · Accepted Answer

The independent variable is the normal or backward speech played to the babies, as this is what is being manipulated by the researchers. The dependent variable is the blood flow in the babies' brains, as this is what is being measured as a result of the manipulation of the independent variable. The term "control variable" is not appropriate in this study, as there is not a variable being held constant for comparison.

Your Text Describes a Study in Which Researchers Played Recordings