Which term describes the measurable effect or outcome researchers focus on?

• A. Dependent Variable
• B. Independent Variable
• C. Observation
• D. Experiment

Answer: (A)

The measurable outcome researchers focus on is the dependent variable. This is the result that changes in response to what the researcher manipulates. In an experiment, you set up a condition you control—the independent variable—and observe how the dependent variable responds. For example, if you vary the amount of fertilizer (the independent variable) and measure plant growth (the dependent variable), the growth you record is the outcome being studied because it depends on the fertilizer level. The other terms describe different ideas: the independent variable is what you deliberately change, an observation is the act of recording data, and an experiment is the overall study design.