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Phenomenology of Chew and Spit (CHSP)

Phillip Aouad, Phillipa Hay (UWS), Nerissa Soh, and Stephen Touyz

The University of Sydney



As the name suggests, Chew and Spit (CHSP) is the compulsive behavior of chewing food then spitting it out before swallowing, as a means to avoid the intake of nutrients and unwanted calories. Regardless of an individual’s eating disorder (ED) diagnosis, the basis for associated behavior is usually weight management, characteristically with the intention of modifying ones appearance. CHSP is one approach being used by some to achieve this.

Partcipants must be 18 years or older and must have (or currently be) engaged in CHSP.

The study will involve a series of recorded interviews as well as keeping a journal/ diary surrounding your experiences and feelings of chewing and spitting. Participation is voluntary and you may withdraw at any time without consequence. The aim of the study is to understand the functions of the behavior and what it means to you. Your input and experiences may help future research in tailoring treatments for those who CHSP.


Please keep in mind that this study is not intended as treatment and is purely exploratory. If you are interested you are encouraged to contact the researchers either via phone (+61 422 146 295) or email phillip.aouad@sydney.edu.au.

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