Experimental techniques refer to the methods and tools used in scientific research to collect data, test hypotheses, and study phenomena in a controlled environment. These techniques often involve manipulating variables and measuring outcomes to understand cause-and-effect relationships. Some common experimental techniques include observational studies, surveys, field experiments, laboratory experiments, and simulations. Researchers use a combination of these techniques to gather evidence, make predictions, and draw conclusions in various fields such as biology, psychology, physics, chemistry, and engineering. Experimental techniques play a crucial role in advancing scientific knowledge and understanding the world around us.