Mark conducts a study for his research methods class to determine if consuming caffeine causes people to perform better on cognitive tasks. In his study, he gives half of his participants a glass of water and half of his participants a glass of cola and then has them attempt to solve 15 math problems. He finds that people who drink caffeine beforehand solve more math problems than those who drink water beforehand.
Mark decides to conduct the exact same study again to ensure that he can find the same difference between the groups a second time. This study is known as a:
A)direct replication.
B)replication-plus-extension.
C)conceptual replication.
D)secondary replication.

Question

Quizplus · Accepted Answer

A direct replication involves conducting the exact same study with the same methods and procedures to see if the same results are obtained. This ensures that the initial findings are not just due to chance or other extraneous factors, and increases the confidence that the results are reliable and can be generalized to a larger population.

Mark Conducts a Study for His Research Methods Class to Determine