Phenomenology of Chew and Spit (CHSP)

About this study

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.

Research TeamPhillip Aouad, Phillipa Hay (UWS), Nerissa Soh, and Stephen Touyz
InstitutionThe University of Sydney
Ethics Approval Number2016/544
Project Start Date6 October 2016
ParticipantsPartcipants must be 18 years or older and must have (or currently be) engaged in CHSP.
Contact Details

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

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