Why were single-case experiments more popular in the past than now?
A) Several popular statistical techniques were invented that made multiple-group experiments easy to analyze.
B) Researchers now prefer to manipulate an independent variable.
C) There were fewer people to serve as participants in the past than there are now.
D) All of the above.

Question

Quizplus · Accepted Answer

Single-case experiments were more popular in the past because there were fewer statistical techniques available for analyzing multiple-group experiments. As statistical methods advanced, it became easier to analyze data from multiple-group experiments, making them more popular.

Why Were Single-Case Experiments More Popular in the Past Than