A researcher observed the eating patterns of laboratory rats while manipulating the amount of sleep they received during a week-long study.In this example,what type of variable is "sleep"?
A) observable
B) dependent
C) independent
D) extraneous

Question

Quizplus · Accepted Answer

"Sleep" is being intentionally manipulated by the researcher, which makes it the independent variable. The dependent variable in this experiment would likely be the eating patterns of the laboratory rats. Observable variables are those that can be directly observed or measured, whereas extraneous variables are those that are not intentionally manipulated but may still have an effect on the dependent variable.

A Researcher Observed the Eating Patterns of Laboratory Rats While