Happy to write: A first study about the influence of writing on your mood

INTERVENTION: The experimental manipulation consists of short writing assignments in which adolescents learn to focus on what their body can do (body functionality), for example senses, exercise, health, creative activities, personal care and communication with others. The control task consists of comparable writing assignments about observing details during daily routines. Both groups receive both tasks. The experimental group first receives the intervention and then the control task. The control group first receives the control task and then the intervention. CONDITION: Eating disorders, negative body image PRIMARY OUTCOME: We would like to know if this manipulation has a positive influence on body image. Specifically we would like to investigate the; influence of state measures of body satisfaction, body appreciation and overinvestment of weight and shape.; SECONDARY OUTCOME: In addition, we are interested in ; 1) the duration of a potentially positive effect in the experimental group. Therefore, this group is assessed again after 15 and 30 minutes. ; 2) investigate to what extent a potential positive effect can be replicated in the control group when this group receives the experimental writing task after the control task. ; 3) whether a more positive body image (as result of the intervention) leads to a decrease in intention for food restriction. ; 4) exploring to what extent body functionality in this groups correlates with other indices of body image and general well‐being. ; 5) Finally, we are interested how many participants after the experiment are interested in conducting 3 additional writing assignments at home and what the effect is of these additional sessions.; INCLUSION CRITERIA: Girls between the age of 14‐23 who are in treatment or who are referred to the Centre for Eating Disorders of Accare and meet the DSM‐5 criteria of anorexia nervosa, bulimia nervosa or eating disorder not otherwise specified.