What research has manipulation as part of its research?

* Experimental research. This type of research involves manipulating one or more independent variables to see how they affect a dependent variable. For example, a researcher might manipulate the amount of fertilizer they give to a plant to see how it affects the plant's growth.

* Quasi-experimental research. This type of research is similar to experimental research, but the researcher does not have complete control over the independent variables. For example, a researcher might study the effects of a new educational program by comparing students who participate in the program to students who do not.

* Non-experimental research. This type of research does not involve manipulating any variables. Instead, the researcher observes and records data without trying to influence the outcome. For example, a researcher might observe the behavior of children in a playground to learn more about child development.