One group of 15 students studies the text of a story about gang violence while listening to rap music. a second group of 10 students studies the same story while listening to classical music. the experimenter then asks both groups to write down any details they can remember from the story. in this research design, the independent variable most likely is the:

a size of the group.
b. amount of story detail remembered.
c. type of story.
d. type of music listened to

D.type of music listened to                  

Explanation:

In the psychological and scientific experiment, there are two types of the main variable including dependent and independent variable.

Independent variable: The term independent variable is defined as a variable that is being manipulated, controlled, and changed in an experiment to measure its effect on the dependent variable. Any manipulation or changes in the independent variable will cause a direct effect on the dependent variable.

In the question above, the independent variable is the "type of music listened to".