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)a valid study.
B)an experiment.
C)a case study.
D)a reliable study.

Question

Quizplus · Accepted Answer

An experiment involves manipulating one variable to discover its effect on another variable. Therefore, option B is the correct answer. Option A is incorrect as a valid study can refer to any research design that is conducted properly regardless of whether it is experimental or not. Option C is incorrect as a case study refers to an in-depth analysis of a single individual or a small group. Option D is incorrect as reliability refers to the consistency of measurement and is not specifically related to experimental design.

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