Suppose a researcher wants to determine if the size of the observing crowd to some emergency situation is relevant to whether the victim will receive help.The researcher randomly assigns participants to one of three groups: no other bystanders,one other bystander,or four other bystanders.When an emergency is then staged,the researcher measures how long it takes the participant to help the victim.In this study,what is the independent variable?
A)Number of bystanders
B)The group with four other bystanders
C)The group with one other bystander
D)The group with no other bystanders

Question

Quizplus · Accepted Answer

The independent variable is the variable that is manipulated by the researcher. In this case, the researcher is manipulating the number of bystanders present during the emergency situation. Therefore, the independent variable in this study is the number of bystanders. B, C and D are just the levels of the independent variable.

Suppose a Researcher Wants to Determine If the Size of the Observing