Which statement defines a dependent variable?

A dependent variable is defined as the outcome variable that is influenced by the independent variable in an experiment or study. This means that the dependent variable is what researchers measure to determine the effect of the independent variable. For instance, if a study is examining how varying amounts of sunlight (the independent variable) affect plant growth (the dependent variable), the growth measurements are dependent on the sunlight levels provided. The dependent variable responds to the changes made in the independent variable, reflecting the outcome or results of the research.

In contrast, the other statements describe characteristics of other types of variables. For example, the manipulated variable refers to the independent variable, which is purposefully changed during the experiment. The variable that does not affect the outcome is not a recognized term in research methodologies. Finally, the variable that remains constant throughout research typically refers to control variables, which are kept unchanged to ensure that any observed effects can be attributed to the independent variable rather than extraneous factors. Thus, identifying the dependent variable correctly is crucial for understanding the dynamics of an experimental design and interpreting results.