Researchers studying plant growth raised plants in two different rooms.One room had soft music playing 24 hours a day; the other room was silent.The researchers found that the plants grew better in the room where the music was played.In this study, the type of room (soft music or silent) would be:

Question

Quizplus · Accepted Answer

The type of room (soft music or silent) is the independent variable because it is being manipulated by the researchers to see its effect on the plant growth. This is the variable that the researchers are interested in studying and measuring its effect on the dependent variable (plant growth). A placebo is a treatment or substance that has no therapeutic effect and is used to control for the placebo effect. A confounding variable is a variable that is not controlled for in the study and may affect the relationship between the independent and dependent variables. None of these definitions apply to the type of room in this study.

Researchers Studying Plant Growth Raised Plants in Two Different Rooms