I need an operational definition for spitting. Here is the criteria for this definition:

Objective: the measure refers to observable characteristics of the behavior, or events in the environment which can be observed.

Clear: a definition is so unambiguous it can be read, repeated, and paraphrased by an observer or someone initially unfamiliar with the measure. Little explanation is needed to begin actual observation o the behavior. Clear definitions allow for two observers to agree on occurrences and non-occurrences.

Complete: delineation of the boundary conditions so that the responses to be included and excluded are enumerated.