Improving validity

• How do we improve validity in experiments?

  Control groups, standardisation, single-blind/double-blind
• How do we improve validity in questionnaires?

  Lie scale, anonymity
• How do we improve validity in observations?

  Make behavioural categories less broad
• What method of research has high ecological validity

  Qualitative
• Why does qualitative research have high ecological validity?

  Depth and detail
• How do we improve validity in qualitative research?

  Triangulation