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.
One of the key factors in this process is the identification and operational definition of variables -- traits, characteristics, or other measurable factors that can have different values -- that impact the phenomenon of interest. One is primarily interested in two types of variables: independent variables and dependent variables. The independent variable is the variable that is being manipulated by the researcher. For example, Dr. Harvey has a theory that the way that people dress affects how they are treated by others in the workplace.
an independent variable (IV) and dependent variable(s) (DVs). An Independent Variable is manipulated (controlled) by the experimenter, and has at least two different conditions (e.g., âtreatmentâ and âcontrolâ conditions). Experimental Research Dependent variablesare measured by the experimenter, and are used to determine the effect of the Independent Variable. In most experiments, researchers measure several dependent variables to learn the effect of the independent variable. Examples of Experimental Research Letâs watch the Psychologist and the Experiment Review: Nonexperimental Versus Experimental Methods Nonexperimental method