A researcher wished to study the impact of classical music on memory in children. She therefore randomly selected two groups of children. One group was asked to read and later to recall lists of words while soft classical music played in the background. The second group was asked to read and recall lists of words with no background music playing.
The dependent variable in this experiment is the:.
A. number of words recalled by the children
B. amount of time each child needs to recall the words
C. amount of music each child can recall
D. classical music playing in the background
E. lack of classical music playing in the background