Imagine that we are interested in how maternal separation affects stress early in life. to explore this relationship, we randomly assign young rat pups to either be separated from their mothers for 8 hours per day or to remain with their mothers all day. we then measure corticosterone levels (a hormonal marker of stress) in all of the rat pups at the end of the day. what is the independent variable?

separating rat pups from their mother

Explanation:

According to my research on the scientific method, I can say that based on the information provided within the question the independent variable in this experiment is separating rat pups from their mother. This is because the values of dependent variables depend on the values of independent variables. Therefore in this situation the levels of stress (dependent variable) depends on separating rat pups from their mother (independent variable).

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