The independent variable in an experiment is defined or identified as _________.
A) "IQ", in an experiment studying the effect of Early Education on IQ.
B) variable that is systematically manipulated by the experimenter
C) the variable the experimenter measures to determine if there is a real effect
D) "Early Education", in an experiment studying the effect of Early Education on IQ
E) the variable that is systematically manipulated by the experimenter and "Early Education", in an experiment studying the effect of Early Education on IQ

Question

Quizplus · Accepted Answer

The independent variable in an experiment is the variable that is systematically manipulated by the experimenter to observe its effect on the dependent variable. In the context of an experiment studying the effect of Early Education on IQ, "Early Education" is the independent variable because it is what the experimenter changes or manipulates to see if it affects IQ levels, making both parts of option E correct.

The Independent Variable in an Experiment Is Defined or Identified