A research procedure in which a variable is manipulated and the manipulation's effect on another variable is observed is called a(n):

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An experiment involves manipulating a variable (independent variable) and observing its effect on another variable (dependent variable), which is the classic method for establishing causality in psychology. Case studies involve deep exploration of a particular individual or group, while correlation examines the relationship between two variables without manipulation. The independent variable is the variable that is manipulated in an experiment, but it is not the research procedure itself.

A Research Procedure in Which a Variable Is Manipulated and the Manipulation's