Participants will receive a 5 session once a week group emotion regulation skills training adjacent to treatment as usual provided by the eating disorder unit at the child and adolescent psychiatric clinic, Linköping, Sweden.

The adjunctive emotion regulation skills training is delivered in a group format once a week during 5 weeks to young adults with eating disorders together with treatment as usual

Difficulties with Emotion Regulation Scale measures difficulties with emotion regulation. It contains a total of 36 items that are rated on a Likert scale between 1-5. Total score ranges between 36-180 with higher scores indicating more difficulties with emotion regulation. The scale has 6 subscales: nonacceptance (ranging from 6-30); goals (ranging from 5-25); impulse (ranging from 6-30); awareness (ranging from 6-30); strategies (ranging from 8-40) and clarity (ranging from 5-25).

Toronto Alexithymia Scale measures alexithymia. It contains a total of 20 items with 3 subscales (difficulties describing feelings: 7 items ranging from 7-35, difficulties identifying feelings: 5 items ranging from 5-25 and externally oriented thinking: 8 items ranging from 8-40). Total scores range from 20-100 with higher scores indicating higher levels of alexithymia.

The Eating Disorder Examination Questionnaire (EDE-Q) is the self-report version of Eating Disorder Examination (EDE) and measures the characteristics of eating disorders. The 6.0 version used in this study consists of 28 items. EDE-Q is scored on a 7-point Likert scale, from "no days" to "every day" and higher scores indicate higher eating pathology. The total score ranges from 0-196. The questionnaire comprises a total scale and subscales for restraint, eating concerns, shape concerns and weight concerns.

The Clinical Impairment Assessment Questionnaire (CIA) measures the psychosocial impairment of eating disorders. It focuses on the last 28 days and consists of 16 items, graded on a Likert scale from "Not at all" to "A lot". Higher scores indicate higher level of secondary psychosocial impairment and the total scores ranges from 0-48. The CIA is designed to be completed immediately after filling in a measure of current eating disorder features that covers the same time frame (e.g., the EDE-Q).

Montgomery Åsberg Depression Rating Scale measures symptoms of depression. Its main purpose is to monitor the development of symptoms during treatment. The scale consists of 9 items, which are graded from zero to six. Total scores range from 0-54. Higher scores indicate higher level of depression symptoms.