Which of the following are the two methods used in experiments to ensure that the experimental and control groups are equivalent
A)pretesting and matching
B)extraneous variability and experimental variability
C)random assignment and matching
D)random assignment and pretesting

Question

Which of the following are the two methods used in experiments to ensure that the experimental and control groups are equivalent
A)pretesting and matching 
B)extraneous variability and experimental variability
C)random assignment and matching
D)random assignment and pretesting

Quizplus · Accepted Answer

Random assignment and matching are two methods used to ensure that experimental and control groups are equivalent by distributing participants evenly across groups and matching them based on certain characteristics.

Which of the Following Are the Two Methods Used in Experiments