DClinPsy Portfolio Volume 1 of 3 - University of Hertfordshire ...

Table 12 - Descriptive statistics for the Avoidance and Fusion clinical scale regarding
inflexibility for the BMI groups
Body Mass Index (BMI) Category Avoidance and Fusion (higher scores indicate inflexibility)
Healthy
N
Mean (Std error)
Median
SD
Min-Max
Skewness (Std error)
Overweight
N
Mean (Std error)
Median
SD
Min- Max
Skewness (Std error)
Underweight
N
Mean (Std error)
Median
SD
Min-Max
Skewness (Std error)
61
28.48 (1.44)
30
11.26
5-62
0.23 (0.31)
14
28.29 (4.18)
24
15.62
0-53
-0.05 (0.60)
21
29.86 (2.72)
30
12.44
14-56
0.18 (0.50)
As can be seen in Table 12 mean inflexibility is slightly higher in the underweight group
(29.86) in comparison with both the overweight (28.29) and the healthy (28.48), this will
be tested using the Mann Whitney U Test for consistency. The skewness is minimal and
the distributions are normal.
Table 13– Results from the Mann Whitney U Test exploring inflexibility in relation to
BMI
Comparison
Avoidance and Fusion
1.Underweight compared to
Healthy BMI
2. Overweight compared to
Healthy BMI
Mean
difference
Z p-value
(1- tailed)
-1.38 -0.4 0.32 0.12
0.19 0.07 0.48 0.02
Effect size
(Cohen’s d)
175