An intentional bias occurs when a person or group deliberately alters data in order to change the results of an experiment or study. This type of bias influences the information gathered to go in a certain and predetermined direction. To be an intentional bias the alteration of data and results must be deliberate.To conduct a scientific investigation without bias, you would need to select a random sampling of people and set up preliminary guidelines. ... To avoid bias, you must survey a random sampling of people, not just family and friends!
