The document discusses the experimental method. It describes the steps involved in conducting an experiment, including identifying the problem, reviewing literature, formulating hypotheses, designing the experiment, conducting it, analyzing data, and presenting conclusions. Key aspects of experiments are identified, such as the experimenter, subjects (which are divided into control and experimental groups), and variables (independent and dependent). Controlled experiments use experimental and control groups to isolate the effect of the independent variable. Double-blind studies are described as protecting against biases by keeping both participants and experimenters unaware of group assignments.