Internet-Behavioral Cough Suppression Therapy

Inclusion Criteria: * No barriers to using a computer or smartphone (e.g., no significant fine motor or visual problems). * Internet and e-mail access and the ability to use it. * Suffering from a cough lasting at least eight weeks that is: * Largely unproductive (cough up no more than a few teaspoons worth of clear or white sputum or mucus in a 24-hour period). * Report of cough triggered by identifiable stimuli including and not limited to any combination of the following: cold air, talking, laughing, taking a deep breath, exercise, crumbly foods, strong smells or odors, fumes from paint or cleaning sprays. * Often preceded by the sensation of an urge-to-cough (e.g., tickle or itch) at the level of the throat. * Self-report of receiving the following assessments for current cough symptoms with unremarkable results: * Physical evaluation by at least one physician. * Chest x-ray. * Willingness to avoid other potential cough treatments during the course of the study (or alert study personnel if alternative treatment is implemented out of necessity). Exclusion Criteria: * Current smoker of any substance. * Diagnosis of any of the following: * Respiratory disease (e.g., chronic obstructive pulmonary disease, asthma) * Neurogenic disease (e.g., Parkinson's disease, cerebrovascular disease) * Head and neck cancer * Self-report of difficulty swallowing since having chronic cough * Use of the following medication: * Angiotensin-converting enzyme inhibitor (ACE-I) in the past four…