Assessing motivation to change in bulimia nervosa: the Bulimia Nervosa Stages of Change Questionnaire.
OBJECTIVE
To assess motivation to change in adolescent patients with bulimia nervosa through the Bulimia Nervosa Stages of Change Questionnaire (BNSOCQ), an instrument adapted from the Anorexia Nervosa Stages of Change Questionnaire (ANSOCQ) already validated in anorexic patients.


METHODS
Subjects were 30 bulimia nervosa patients (mean age = 16.3 years) who were receiving treatment at an eating disorders unit. The evaluation instruments were: the BNSOCQ, the Eating Disorders Inventory (EDI-2) and the Beck Depression Inventory (BDI). The BNSOCQ was re-administered 1 week later to evaluate test-retest reliability.


RESULTS
The BNSOCQ demonstrated good internal consistency (Cronbach's alpha = 0.94) and one week test-retest reliability (Pearson's r = 0.93). Negative significant correlations were found between the BNSOCQ and several EDI-2 scales (Pearson's r between -0.51 and -0.84) and the BDI (r = -0.74).


CONCLUSIONS
The study provides initial support for the reliability and validity of the BNSOCQ as a self-report instrument for assessing motivation to change in adolescents with bulimia nervosa.
Department of Child and Adolescent Psychiatry and Psychology Hospital Clínic Universitari of Barcelona, Institut d'Investigacions Biomèdiques August Pi I Sunyer, Spain.
Esteve
E
Martinez
Josefina
J
Castro
Aitana
A
Bigorra
Astrid
A
Morer
Rosa
R
Calvo
Montserrat
M
Vila
Josep
J
Toro
Elisabeth
E
Rieger
D000293:Adolescent; D002032:Bulimia / Q000175:diagnosis* / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D009042:Motivation; D011581:Psychological Tests; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires