Manipulation is the practice of influencing or controlling someone or something in order to achieve a desired outcome. In the context of research, manipulation typically refers to the process of changing certain variables or conditions in an experiment in order to study the effects of these changes on a particular outcome or response. This can involve manipulating independent variables to test their effect on dependent variables, or manipulating experimental conditions to observe how they impact results. Manipulation is a common technique in experimental research and is used to test hypotheses, uncover causal relationships, and draw meaningful conclusions.