Professor Hoffman was interested in the effects of vitamin B12 deprivation on maze learning in rats. One group is given a vitamin B12 injection. The comparison group is given a placebo injection. He finds that the vitamin group learns the maze faster. In this study, the independent variable is _______ and the dependent variable is _______.
A)speed of learning; type of injection
B)type of injection; speed of learning
C)vitamin B12; placebo
D)type of injection; number of errors
E)speed of learning; concentration of sugar

Question

Quizplus · Accepted Answer

The independent variable is the type of injection (vitamin B12 vs. placebo), as it is what the researcher manipulates. The dependent variable is the speed of learning, as it is the outcome that is measured to see if it changes due to the manipulation of the independent variable.

Professor Hoffman Was Interested in the Effects of Vitamin B12