What is the defining characteristic of a true experiment?
A) use of at least one variable
B) direct control over extraneous variables
C) direct manipulation of the IV
D) use of two equal groups
Question 2
A multiple regression analysis in which predictor variables are entered into the equation in an order predetermined by the researcher is called a regression analysis.
a. stepwise
b. hierarchical
c. partial
d. standard
e. cross-lagged