When placing participants into conditions or groups for a study, researchers should use ________to ensure each participant has equal probability of being placed into each group.
A)external validity
B)systematic sampling
C)random sampling
D)random assignment

Question

Quizplus · Accepted Answer

Random assignment is the method used to ensure equal probability of participants being placed into each group. Option A (external validity) is related to the generalizability of the results, option B (systematic sampling) is a method of sampling which is not relevant in this context and option C (random sampling) is a method of selecting a sample from a population which is also not relevant in this context.

When Placing Participants into Conditions or Groups for a Study