Can two independent variables be correlated?
H. M. BLALOCK, JR. Whenever two supposedly independent variables are highly correlated, it will be difficult to assess their relative importance in determining some dependent variable. The higher the correlation between independent variables the greater the sampling error of the partials.
Can an experiment have no independent variable?
In a scientific experiment, you cannot have a dependent variable without an independent variable. Example: You are interested in how stress affects heart rate in humans. Your independent variable would be the stress and the dependent variable would be the heart rate.
Is gender a true independent variable?
These include gender, age, and ethnicity. Such attributes may be modeled and treated as statistically independent but are not subject to random assignment, as are independent variables.
What is the characteristic of an independent variable?
The independent variable (IV) is the characteristic of a psychology experiment that is manipulated or changed by researchers, not by other variables in the experiment. For example, in an experiment looking at the effects of studying on test scores, studying would be the independent variable.
Is fear an independent variable?
The independent variable is amount of fear. The dependent variable is the amount of attraction a participant experiences.
What are the two basic types of variables?
Discrete and continuous variables are two types of quantitative variables:
- Discrete variables represent counts (e.g. the number of objects in a collection).
- Continuous variables represent measurable amounts (e.g. water volume or weight).
What are the four types of variables?
Four Types of Variables You can see there are four different types of measurement scales (nominal, ordinal, interval and ratio). Each of the four scales, respectively, typically provides more information about the variables being measured than those preceding it.