A Test of Acceptance-based Bibliotherapy for Hoarding Disorder

The investigators are proposing to test an Acceptance and Commitment Therapy (ACT) based bibliotherapy intervention as a self-help approach to hoarding disorder. Participants will be 60 adults meeting the clinical cutoff score for the Saving Inventory-Revised, a hoarding severity measure and will be randomly assigned to receive the intervention or to a waitlist control condition.

Inclusion Criteria: * Aged 18 or order * Residing in the United States * Being interested in testing a self-help book for hoarding * Meeting the clinical cutoff score for the Saving Inventory-Revised Exclusion Criteria: * Being under the age of 18 * Residing outside the United States * Not having fluency in English sufficient to understand study materials * Not being able to understand the study procedures * Being suspected of being a bot/invalid respondent based on their responses * Self-reported conditions that would interfere with participating (e.g., a disorder such as bipolar disorder or schizophrenia)