Adult 1 Anxiety Disorders 1 Article 1 Depressive Disorder 1 Female 1 Humans 1 Intention 1 Male 1 Mental Health Services 1 Patient Acceptance of Health Care 1 Psychoeducation 1 Psychotherapy, Group 1 Surveys and Questionnaires 1 United Kingdom 1 adult 1 anxiety 1 anxiety disorder 1 attendance 1 autoregulation 1 basic research 1 behavior 1 controlled study 1 depression 1 dropout female 1 group therapy 1 human 1 implementation intention 1 intervention 1 major clinical study 1