A controlled test of a hypothesis,in which the researcher manipulates one variable in order to discover its effect on another variable,is called a/an:
A)correlational study.
B)experiment.
C)control condition.
D)single-blind study.

Question

Quizplus · Accepted Answer

An experiment involves manipulating one variable while keeping all other variables constant in order to observe its effect on another variable. The other options do not involve manipulating variables in a way to test a hypothesis. Correlational studies simply look at the relationship between two variables without manipulating anything, control conditions are used as a comparison group in experiments but do not involve manipulation of a variable, and single-blind studies involve hiding the identity of the treatment or control group from the participants, but do not involve manipulation of a variable.

A Controlled Test of a Hypothesis,in Which the Researcher Manipulates