The interoceptive training consists of four 25-30 minute modules (plus 15-minutes worth of optional weekly practice) that focus on multiple aspects of interoception including: body awareness, body sensations and movement, eating, health and selfcare, emotional awareness, and understanding the self in relation to others. These modules are delivered weekly.

Reconnecting to Internal Sensations and Experiences (RISE) is a novel, self-guided interoceptive intervention designed to be accessible and convenient. RISE is hosted on Qualtrics and accessed on any internet-enabled device. RISE consists of four interactive 30-minute modules: (1) Progressive Muscle Relaxation and Body Functionality, (2) Understanding, Noticing and Managing Emotions, (3) Self-care and Communication, and (4) Body Sensations. The training consists of a mix of audio clips, psychoeducation, self-guided reading, and interactive writing prompts. Intervention materials are separated by multiple free-response prompts so that participants can relate the materials to their own lives, practice the introduced skills, and problem-solve difficulties implementing the skills.

The Multidimensional Assessment of Interoceptive Awareness, Version 2 is 37-item scale that has 8 subscales that measure the ability to recognize and accurately identify emotions and physiological sensations. Each item is rated on a 0-5 Likert scale, thus total scores can range from 0-185. Higher scores indicate better interoceptive awareness.

10 item subscale assessing interoceptive deficits, including gastrointestinal interoception

The Eating Disorder Examination Questionnaire is a self-report assessment of eating disorder symptoms that assesses eating disorder behaviors (e.g., excessive exercise, binging, purging, fasting) and includes 4 subscales: weight concerns, shape concerns, restraint, and eating concerns. Items are rated on a 0 (No days) to 6 (Every day) scale. The global score is computed by summing the items and taking the mean, thus scores can range from 0-6. Higher scores indicate more eating pathology.

The Treatment Acceptability Questionnaire (TAQ) is a 6-item self-report assessment of the acceptability of the treatment. However in the current study the item pertaining to "How knowledgeable the psychologist is" will be removed as the intervention is delivered online; thus, the TAQ will be assessed with 5 items. Items are rated on a 1-7 Likert scale, and scores can range from 1-35. Higher scores indicate more treatment acceptability.