In an experiment, the presence of a(n) __________ is manipulated by the researchers so that its effects may be determined.

Question

Quizplus · Accepted Answer

The independent variable is the variable that is manipulated by the researchers in order to determine its effects on the dependent variable. The dependent variable is the variable that is measured in response to changes in the independent variable. The placebo is a fake or ineffective treatment that is given as a control in experiments. An observer is someone who watches and records data but does not manipulate variables.

In an Experiment, the Presence of A(n) __________ Is Manipulated