Brain tumor . Depending on where it is, it can cause different types of hallucinations. If it's in an area that has to do with vision, you may see things that aren't real. You might also see spots or shapes of light. Tumors in some parts of the brain can cause hallucinations of smell and taste.
The second major variable of interest to researchers is the dependent variable. The dependent variable (so called because its value depends on which level of the independent variable the subject received) is the response to the independent variable. In Dr. Harvey's research study, the dependent variable is the way that people are treated in the workplace. Dr.
The independent variable is one changed in an experiment to test effects on the dependent variable. American Images Inc/Photodisc/Getty Images. Definition: An independent variable is the variable that is changed or controlled in a scientific experiment.Independent variables are the variables that the experimenter changes to test their dependent variable.The effect on the dependent variable is measured and recorded. Common Misspellings: independant variable.merican Images Inc/Photodisc/Getty Images. Definition: An independent variable is the variable that is changed or controlled in a scientific experiment. Independent variables are the variables that the experimenter changes to test their dependent variable.