In the research on decompression of pregnant rats,the independent variable was ____ ,a dependent variable was ____ ,and a control variable was ____.
A) reduced air pressure; behavioral tests; strain of rat
B) body weight; climbing ability; time of day
C) atmospheric pressure; age of rat; climbing ability
D) number of decompressions; body weight; home cage
E) experimental group; control group; test performance

Question

Quizplus · Accepted Answer

In this research scenario, the independent variable is "reduced air pressure" because it is the condition being manipulated to observe its effect on the rats. A dependent variable is "behavioral tests" because it is what is being measured in response to changes in the independent variable. A control variable is "strain of rat" because it is kept constant to ensure that any observed effects on the dependent variable are due to changes in the independent variable, not differences in the genetic background of the rats.

In the Research on Decompression of Pregnant Rats,the Independent Variable