Wiles' Study of CBT

• Aim

  To test the benefits of using both CBT and anti-depressants for treatment-resistant depression - rather than anti-depressants alone
• Method


  Patients with treatment-resistant depression either continued using just anti-depressants or took part in CBT as well. Improvements were measured using the BDI
• Results

  After 6 months 422 participants remained in the study

  21.6% of those who were given just usual care had a >50% reduction in their symptoms, but 46.1% of those who had their usual care and CBT noticed a similar reduction
• Conclusion

  Using CBT and anti-depressants in conjunction is more effective than just anti-depressants
• Weakness


  The study used self-reporting methods which may have meant that participants didn't score their depression accurately
• Strength


  The participants were randomly assigned to the groups which controlled extraneous variables