Final answer:
Causal research is the type of research that aims to determine how a change in one factor changes another. It often involves controlled experiments where the independent variable is manipulated to observe its effect on the dependent variable. This is different from correlational research, which can't establish cause-and-effect relationships.
Step-by-step explanation:
Research that involves trying to determine the extent to which the change in one factor changes another one is referred to as c) causal research. Causal research is designed to determine whether one or more variables cause or affect one or more outcome variables. This type of research often involves experiments where the independent variable is manipulated to observe the effects on the dependent variable. An example of this could be a controlled experiment that tests whether a new teaching method affects student performance, with the teaching method being the independent variable and student performance being the dependent variable.
In contrast, correlational research looks at the relationship between at least two variables, but unlike causal research, it cannot determine if one variable causes the change in another. It's also important to mention that other forms of research, like archival research or cross-sectional research, have different focuses and methodologies, and may not be suitable for establishing cause-and-effect relationships.