RM Tut 3

• Critical Appraisal Skills:

  • measuring internal validity:
  • is the method of research appropriate for the question?
  • is the research of good quality?
  • measuring external validity:
  • are the results relevant to your group/individual?
  • is the research generalisable?
  • what is the size of the beneficial/negative effect?
• Comparison of internal validity and external validity:

  • internal validity
  • tight control of all variables
  • strict sampling
  • rigorous measurement
  • experimental manipulation
  • external validity:
  • broad and inclusive
  • looser control - variability
  • reflects real world practice and measures