Question 2 (1 point) An "operational definition" of a variable is the definition that the researcher gives the variable in order to make it measurable. Operational definitions should be ambiguous. First statement is true; second statement is false. O First statement is false; second statement is true. both statements are true O both statements are false Question 3 (1 point) To say that a research study "has internal validity" means that: the researchers have done their best to control extraneous variables. the independent variable had no effect the dependent variable was not measured uncontrolled variables may have affected the dependent variable and therefore the results of the study.