Experimental Method

• Aim


  What the researcher wishes to study, but with no expectations.
• Hypotheses


  A testable prediction, often implied by a theory
• Directional hypothesis


  The researcher makes it clear what difference is anticipated between the 2 conditions or groups.
• Non-directional hypothesis


  Simply states that there is a difference but not what the difference will be.
• Experimental method


  A method of investigation used to demonstrate cause-and-effect relationships by purposely manipulating one factor thought to produce change in another factor.
• Independent Variable


  The experimental factor that is manipulated; the variable whose effect is being studied.
• Dependent variable


  The outcome factor: the variable that may change in response to manipulations of the independent variable.
• Operationalise


  Ensuring that variables are in a form that can be easily tested.