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

Results
Section I will provide descriptive statistics regarding socio-demographic variables of the
sample. It will also report the frequencies of the Body Mass Index (BMI) and Eating
Disorder Risk (EDR) groups. These groups will be further explored in relation to other
clinical variables as relevant to the hypotheses in section II. Section II will include testing
of all the hypotheses defined and discussed in turn. Section III includes the testing of
additional research questions. Finally, section IV is a multi-variate analysis of predictors
of EDR.
The use of methods to adjust the statistical significance such as Bonferroni corrections
was considered but in view of the small group sizes involved in hypothesis testing it was
decided to not adjust the significance level below 5% as this would lead to a loss of
power with the danger of failing to detect effect sizes of practical significance. Moreover,
the number of planned comparisons related to the hypotheses were limited and the further
analysis carried out in the last two sections were exploratory.
Section I
1 - Socio-demographic description of the sample
Table 1: Frequency counts and percentages for the socio-demographic characteristics of
the sample
School 1 School 2 School 3 School 4 All
School’s
N 35 (36%) 44 (46%) 14 (15%) 3 (3%) 96 (100%)
M age 12.97 14.2 14.14 12.33 13.69
Min age 12 13 13 12 12
Max age 13 15 15 13 15
SD 0.17 0.63 0.54 0.58 0.80
159