Experimental Method

• Operationalisation

  Clearly defining variables in terms of how they can be measured.
• Aim

  A general statement of what the researcher intends to investigate; the purpose of the study.
• Hypothesis

  A clear, precise, testable statement that states the relationship between the variables to be investigated. Stated at the outset of any study.
• What are the two types of hypothesis?

  • Directional hypothesis: Difference is made clear
  • Non-directional hypothesis: Simply states that there is a difference
• When should you use a directional hypothesis?

  When a theory or the findings of previous research findings from earlier studies suggest a particular outcome.
• When should you use a non-directional hypothesis?

  When there is no theory or previous research, or findings from earlier studies are contradictory.