If extraneous variables are not controlled in an experiment, what major problem will the researcher face?
a. not having enough data to allow for valid statistical analysis
b. the results will be stated in subjective, and possibly biased terms
c. it cannot be known which variable(s) produced the observed results
d. not having enough participants
Question 2
The two effects that influence the dependent variable are main effects and interaction effects in
__________ design.
Fill in the blanks with correct word