6. rats learning a maze are tested after varying degrees of food deprivation. some run the maze after 4 hours without food, others after 8 hours, and others after 12 hours deprivation. in this study,
a. food deprivation is the manipulated independent variable
b. the rats are a subject variable
c. the independent variable is a task variable
d. food deprivation is the dependent variable

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.