Inclusion Criteria:  Sufficient skills in Swedish to be able to fill in self-assessment questionnaires. State at least a 3 (or higher) out of 10 regarding everyday difficulties with emotion regulation according to a scale created for this purpose: Do you feel that you currently have problems regulating your emotions? Circle the number that is best for you "(0 no problems at all, 10 Very severe problems. Answer "Yes, very much" or "Yes" to the following question: "Would you like to learn to regulate/manage your emotions better?" with the options "Yes, very much / Yes / Maybe, but doubtful if it is worth the effort, does not fit right now / No".  Exclusion Criteria:  Psychiatric or somatic status that may prevent the participant from completing the experiment or require some form of care intervention the participant does not already undergo. Medium to high risk of suicide. Moderate to severe self-harming behavior. Blood phobia. Regular medication with benzodiazepines (including sleep medication, ex Stilnoct). Ongoing treatment with emotion regulation elements.  To be part of the clinical group, the participant must state a diagnosis established by a medical professional in the last 5 years, which involves clinical difficulties with emotion regulation such as binge eating disorder, emotional instability, generalized anxiety, depression, social anxiety or ADHD, and does not plan to start, change or discontinue any psychosocial or pharmacological treatment within the next 4 weeks. The non-clinical group must not have been diagnosed or treated for mental illness in the last 5 years.