Transcript Slide 1

A comparative study of the effectiveness of Client Centred
Psychotherapy when
compared to the findings published in Stiles et al 2007.
Simon Carver
Mean pre-post difference for a
variety of treatments
20
16
12
8
4
0
CBT
PCT
PDT
CBT+1 PCT+1 PDT+1
treatment
The graph above shows Pre-post difference
means and plus and minus one standard
deviation, (representing about 68% of all
outcomes). Means are represented by the mid
dot point on the graph lines. The lines show
the distribution of Pre-post difference within
each treatment group,
CCT
Mean Pre-Post Difference for a Variety of Treatments
Mean Pre-Post Difference for a Variety of Treatments
Figure 11 shows that all therapies studied produce similar outcomes when measured using Pre-Post
difference means and one standard deviation (+ or -) from the mean.
CCT results show little variation from results in the original paper.
Treatment Group: Pre-Post Difference and Effect Size
The graph above shows the difference between the pre-therapy CORE-OM
score and the post-therapy score. This is calculated by Pre-therapy mean
scores minus Post-therapy mean scores. The Effect Size is calculated, as
the difference Pre-post therapy divided by the pooled Pre-therapy standard
deviation.
Deterioration Percentages by Treatment Group
Deterioration is an increase in CORE-OM score of 4.9 or more.
This graph above show the percentage of patients that deteriorate from Assessment to the End of Therapy COREOM scores.
•All therapies have low percentage rates of deterioration.
•PDT has the highest percentage of deterioration in patients at 1.9% ,
•CCT has the lowest percentage at 0.01%.
Implications:
• More evidence of equivalency between
therapeutic approaches.
• CCT is a valid therapeutic modality
• This research adds weight to the evidencebase supporting the effectiveness of CCT.