Forty students participated in groups of 4-6. They were given a questionnaire to test their knowledge of the Black cultural stereotype. Subjects were asked to list the components of the stereotype.

After listing the components of the stereotype, subjects completed the Modern Racism Scale. This scale ranges from -14 to +14(high prejudice). Subjects were assigned to a high prejudice(N=21) or low prejudice group(N=19) based on the split of scores on the scale.
Find the independent variable values, and dependant value of the study.

I'm suppose to make a study map where it shows the different values(conditions) of the independant variable and the dependant variable...but I can't seem to figure out what is what.

I was thinking that since there are two tests administered, I was suppose to make two maps, but I'm not sure.

So for the second map, I was thinking that the two values(conditions) for the independant variable was

Score of N=19->low prejudice group
Score of N=21 -> high prejudice group

Any help is appreciated! thank you