Which of the Following Examples Illustrates Experimental Research

Multiple Choice

Which of the following examples illustrates experimental research?

A) A researcher studies the profiles of National Merit Scholars to determine what factors are associated with their success
B) A researcher does a study where he manipulates the types of memory strategies students are taught and then measures their recall
C) A researcher does a study where he examines the correlation between mathematics anxiety and time to solve a mathematics story problem set
D) A researcher does a study where she carries out a survey that quantifies student beliefs about mathematics and follows that study up with a series of qualitative interviews with students