Download Class 10 - University of Houston

Heppner et al. Chap 12, 18
Hogg & Deffenbacher (1988)
 Design
 Independent
 Dependent
Variables
Variables
 Design
◦ Pre-test/post-test; experimental
 Independent
Variables: Categorical
◦ Group IP Treatment
◦ Group Cognitive Behavioral Trtmnt.
◦ Control Group
 Dependent
Variables-
◦ BDI
◦ MMPI-D
◦ ATQ
◦ Coopersmith SEI

Continuous
Depression
Depression
Automatic Thghts.
Self Esteem
Therapist Assessment of Client Behavior:
◦ one item assessment of: depression, coping,
anxiety, motivation to change, group participation
1.
2.
3.
4.
5.
6.
Treatment Package Strategy
Dismantling Strategy
Constructive Strategy
Parametric Strategy (structural
components)
Comparative Outcome Strategy
Client and Therapist Variation Strategy
Moderation Designs
1.
2.
3.
4.
5.
6.
Treatment Package Strategy
Dismantling Strategy
Constructive Strategy
Parametric Strategy (structural
components)
Comparative Outcome Strategy
Client and Therapist Variation Strategy
(Moderation Designs )
 No
– treatment
 Placebo
 Matched
??

Inclusion Criteria
◦ Cng Center Clients
◦ BDI>14

Exclusion Criteria
◦
◦
◦
◦
Co-morbidity
Suicidal lethality
In therapy
Drug abuse/depend.
 Internal
Validity
◦ Key issue
 External
o Key issue
Validity

Specificity of Treatment

Therapist Training

Fidelity Checks

Treatment Specificity
◦ CBT: emotional transactions
◦ IPT : CB techniques for daily life

Therapist Training
◦ Crossed by sex and theoretical orientation
◦ Weekly supervision; rating tapes on fidelity

Fidelity Checks:
◦ End of treatment blind raters, and
◦ Client Evaluation of Treatment
Main Effects
Between Groups
Treatments:
1. IPT
2. Cog Beh
3. Control
Within Groups
Trial (Time)
1. Pre-Test BDI
2. Post Test BDI
Interaction: Treatment x Trial
BDI
PrePostOverall
Treatment treatment Means
Cognitive
IPT
Control
21.69
19.71
21.00
9.85
9.43
14.30
Mean C
Mean IPT
Mean
Control
BDI
PrePostTreatment treatment
Cognitive
IPT
Control
21.69
19.71
21.00
9.85
9.43
14.30
Mean Pre- Mean PostTreatment Treatment
Overall
Means
BDI
PrePostTreatment Treatment
Cognitive
IPT
Control
21.69
19.71
21.00
9.85
9.43
14.30
Overall
Means
a)
Do clients who receive CBT, or IPT or no
treatment show lower (or higher) BDI post-test
scores than pre-test BDI scores?
Trial Effect – Repeated Measures
a)
Do clients who receive CBT show lower BDI
scores at the end of the 8 weeks than clients
who receive IPT or than clients who do not
receive any treatment? (regardless of Time)
Treatment Effect- Repeated Measures
c) In which of the three experimental groups
clients showed change in depression
following treatment? Treatment x Trial
Interaction – Repeated Measures
d) In which of the three experimental groups
clients showed lower levels of depression at
the end of treatment? Treatment
Effect/Reg ANOVA

Greater early change in
◦ IPT: Self-esteem
◦ CBT: Automatic thoughts
TIME*TREATMENT INTERACTION
Cholesterol Level
(mg/dl)
Here the effect of
time is NOT the same
for both groups.
Thus we say that
there is TIME and
TREATMENT
interaction.
0
treatment
2
4
6
8
TIME (months)
10
1
2
placebo