Experimental methods

• What is the aim of an experiment?

  The purpose of the investigation
• What is a hypothesis?

  A testable, operationalised statement that describes the relationship between between variables
• What is a directional hypothesis?

  Makes clear the sort of difference that is anticipated between two groups or conditions of people
• What is a non-directional hypothesis?

  Simply states that there will be a difference between the conditions but the nature of said difference is not specified